What is an EFS partition? is it safe to flash one to the RN7? - Xiaomi Redmi Note 7 Questions & Answers

Hello everyone:
3 months ago I flashed the Global Rom to my Redmi Note 7 and then proceeded to lock the bootloader and everything is working ok except for the fact that only one of the two sim slots works (the other slot doesn't even appear on the phone settings) and that I have to eject and reinsert my sim every time the phone boots for it to be recognized on the working slot
I've spent all this time trying to find a solution but there's not much information available because the problem is caused by a specific carrier in a specific country (Telcel, México) disabling the second slot (only god knows what they did to the phone).
Anyways, a guide recently surfaced that apparently fixes this issue by the use of Xiaomi Tool, QPST Qualcomm and a series of steps to flash am EFS partition (.qcp file) to the phone.
However I'm not that tech Savy, and even though I could follow the steps on the guide just fine, I have no idea of what the process is going to do and I don't want to ruin this phone as it is my daily driver.
Could somebody out there share some knowledge on the topic? If neccesary I could PM the guide, but it's written in spanish

But as I understand efs partition is IMEI information and shouldn't be flashed with any other... You're doing good to ask...
I have the same problem with the second Sim card or MicroSd but I only have one Sim and a 128 Gb phone so it doesn't import for me... I'll be looking this thread for any solution... Thankyou... ?

I used the guide that you are talking about one week ago and the first thing that I do is see the IMEIs and compare with ones in the box, it is the same.
I resolve the problem to eject the sim every time that I reboot the phone and the 2 sim slots are working. I don't have any problems in my phone for use the guide.
If you have some questions send me a PM. Sorry for my bad English but I'm very new in this languaje.

Related

No Network

Hi good people, I am facing a problem. Around 8 hours back I tried calling someone but the call didn't connect so I restarted the phone and then I lost the network. I tried reboot, flashed different ROMs (unofficial CM14, cm13 nightly build n MM nougat backup), tried with GAPPS and without GAPPS but the problem is persisting. I even tried swapping the Sim cards before that but of no use. I tried debugging by using *#*#4636#*#* but ping test is failed and also there is "TURN RADIO ON" I believe ideally it should be "TURN RADIO OFF". please have a look at the screenshots. I'm almost dying without making important calls.
Update: Guys I have got it working.. Kindly look into my below posts. Please don't misguide people for small issues.
Thanks
In the screenshot we can also see, GSM SERVICE IS OFF. it stays the same even after clean flashing a new custom ROM.
Got it working. Flashed latest COS ROM file however the situation was still the same. Then I removed sim, switched on airplane mode restarted. After reboot inserted Sim then again restarted n then I got the signal
1. Removed Sim card, switched on airplane mode from both power menu and notification toggle.
2. Restart, inserted Sim card and switched off airplane setting from setting. (Notification toggle and power menu didn't work) then got the network.
Please note I tried with only one sim in sim 1 tray. Later I got the network for 2nd sim as well
Narasimha12 said:
Got it working. Flashed latest COS ROM file however the situation was still the same. Then I removed sim, switched on airplane mode restarted. After reboot inserted Sim then again restarted n then I got the signal
Click to expand...
Click to collapse
Which rom did you flash and what was your method of flashing?
You also said simply flashing didn't work. It was what you did with reboot, aeroplane mode and taking out and reinsert the Sim that worked?
I've had the same problem for almost a month now... and i gave my phone to the service center. They called up to inform me that its a motherboard failure and they'll fix it.. I'll provide further info when I get my phone back (probably in 3-4 days)
P.S I tried almost every method to make it work. So if you couldn't make it work in first 2 days or so, dont waste your time and just give it for the servicing (make sure its in Stock OS so that they dont ask any questions about root xD )
lekhwani said:
Which rom did you flash and what was your method of flashing?
You also said simply flashing didn't work. It was what you did with reboot, aeroplane mode and taking out and reinsert the Sim that worked?
Click to expand...
Click to collapse
I flashed almost every latest ROM. But no ROM got the network back. So as a last resort I flashed COS 12.1 and still didn't get the network. Then I removed both the sims, activated flight mode restarted the device, left it couple of minutes and inserted only one sim in first slot. Holla I got the network. Then everything is back to normal
If u r facing the same problem I would suggest u to activate flight mode n restart. If it doesn't work try by removing sim cards, if it still doesn't work try COS 12.1.
lekhwani said:
Which rom did you flash and what was your method of flashing?
You also said simply flashing didn't work. It was what you did with reboot, aeroplane mode and taking out and reinsert the Sim that worked?
Click to expand...
Click to collapse
Usual procedure of flashing. Wipe cache, dalvik, system and data. Flash ROM + Gapps. Reboot
Try to search in the forum. There is a lot of threads with the same problem with the Zuk Z1. It is a hardware problem.
Enviado desde mi Redmi Note 3 mediante Tapatalk
Your modem and baseband sections may be damaged. Modem structure is hidden under qualcomm structure. To Access and repair those sections, you need to do some modifications. I managed to make my Zuk Z1 worked again with some tweaking. Altering that part of the phone is illegal due to its restricted elements such as IMEI number. That's why I cannot post a tutorial here. İt is not allowed. However, I can help you if you personally contact me. I hope you get your signal back soon.
psyckoze said:
Your modem and baseband sections may be damaged. Modem structure is hidden under qualcomm structure. To Access and repair those sections, you need to do some modifications. I managed to make my Zuk Z1 worked again with some tweaking. Altering that part of the phone is illegal due to its restricted elements such as IMEI number. That's why I cannot post a tutorial here. İt is not allowed. However, I can help you if you personally contact me. I hope you get your signal back soon.
Click to expand...
Click to collapse
Please follow xda rules and don't tell people illegal things where they get in trouble. Keep in mind, that's not an illegal forum
Sure thing but I have already mentioned it. I didn't post anything illegal. So, take it easy.
psyckoze said:
Your modem and baseband sections may be damaged. Modem structure is hidden under qualcomm structure. To Access and repair those sections, you need to do some modifications. I managed to make my Zuk Z1 worked again with some tweaking. Altering that part of the phone is illegal due to its restricted elements such as IMEI number. That's why I cannot post a tutorial here. İt is not allowed. However, I can help you if you personally contact me. I hope you get your signal back soon.
Click to expand...
Click to collapse
Hej. I manage to mess upp my baseband/modem proberly when flashing a rom or i messed up in twrp.
Phone show up imei as null and unknown baseband so i would really appriciate you help here.
I still have orginalbox that show my imei so i can enter the correct one when needed.
psyckoze said:
Your modem and baseband sections may be damaged. Modem structure is hidden under qualcomm structure. To Access and repair those sections, you need to do some modifications. I managed to make my Zuk Z1 worked again with some tweaking. Altering that part of the phone is illegal due to its restricted elements such as IMEI number. That's why I cannot post a tutorial here. İt is not allowed. However, I can help you if you personally contact me. I hope you get your signal back soon.
Click to expand...
Click to collapse
Hi, I haven't still gone to the service centre. Kindly pm me the tutorial for getting signals back.

[N9005] RessurectionRemix doesn't detect SIM card

Hi,
when I got my Note 3, I immediately installed Cyanogenmod and from then I only swapped between custom ROMs.
I never actually made a backup of the stock system. (Yes, I was reckless.)
I also never made a backup of any custom ROM before that (Yes, I was really reckless.)
I recently switched from the unofficial Ressurection Remix (from now just called RR) 5.8.2 to the official RR 5.8.4 and since then my SIM card is not detected anymore.
For the setup, I first followed the guide on the thread itself.
Then I paniced and looked up stock firmware for my device, but since they all had more specific names like N9005XXUBMH1 (my phone only says N9005 under the battery), I couldn't identify which one was the correct one and just downloaded a whole bunch and flashed them until one of them worked.
The stock firmware I flashed actually had a working SIM, but was also using power like crazy. I went from 1.5 days to half a day. The stock OS is also horribly bloated in my opinion.
So I looked through the forum and found the Rock Stable Setup, I followed it and got the same result.
I made plenty of nandroid backups with TWRP and restored that every time I started the phone and saw that the SIM wasn't found.
I am currently running RR 5.8.4 and a seperate phone for being reachable, but I would really like reduce that to one phone again.
When I dial *#06# in RR, I just see a windows with IMEI as title but no content. (It shows one in the stock ROM)
Things I have already tried:
Solution Lineage OS No Sim
UpdatePackage by -ION-
If you need any more information, I'd be happy to provide them!
I just really want to use my phone to it's fullest capability again.
Thanks to all replies in advance
Simon
Just search the forum
Sim card not detected
JJEgan said:
Just search the forum
Sim card not detected
Click to expand...
Click to collapse
I know that there are a lot of threads regarding this issue, but most of them are different phones (not N9005) or different conditions.
The ones that I did find that match my conditions roughly are already listed in the first post.
Therefore I belive that my case is different from those threads.
If you find one that I messed, please refer me.
RR rom
Answer You are using an Old Modem .
https://forum.xda-developers.com/search/thread/3630301?query=sim card not detected
https://www.google.co.uk/search?q=x...x-b&gfe_rd=cr&dcr=0&ei=gTpXWv6_NYv98wf9h5-ICg
I only now read about 'getting the firmware to stick'.
I had to flash it three times until both the bootloader and modem versions changed.
Now I have a differen problem:
I can't call or send SMS.
Mobile data works and receiving calls and SMS works flawlessly, even though it sometimes loses contact with the tower.
Anything that cam up in search had either everything not working or solved it in a way that didn't work for me.
I tried rebooting, putting it in a different phone (SIM works there just fine) and putting it back...
Same here... my SIM card is not detected.
I can´t find a way to make it connect to my mobile provider...
It shows no EMEI in "Phone info" app, I asked for help in a RR thread...
If you make it work, please, reply here.
EDIT: Nevermind, this worked https://forum.xda-developers.com/showpost.php?p=72986417&postcount=4141

Have to eject sim after a reboot for the phone to read it (Global Rom)

Hello everyone. After a lengthy battle, yesterday I finally was able to unlock my bootloader, flash a global rom (via MiFlash) to my Redmi Note 7 and lock the bootloader again using fastboot.
However I've encountered an issue that is very annoying. Every time the phone boots, it fails to read my Sim card, so I'm forced to eject it and then reinsert it in order for it to work properly. I use an SD card and I tend to reboot my phone once or twice a week, so you can get an idea of how much of an inconvenience this is.
I'm pretty sure this must be a software Issue because before the ROM change, I've never had an Issue with this. My phone model is M1901F7H and the rom is Miui global (10.3 Stable 10.3.5.0).
I need to mention that my current carrier (I got the phone from them) disables the hybrid sd card/sim slot and sells the phone with only one working sim slot and a custom ROM. After installing the global rom I noticed that now I can enable/disable the dual 4G connectivity for both sims toggle (it was greyed out before) however that is the only option regarding the dual sim settings that I can interact with and the second slot is still only usable for an Sdcard.
Currently I don't care much about the dual Sim feature, but it has crossed my mind that maybe my current Issue is related to this?
Anyways, thank you for taking your time to read this post and I apologize for the wall of text.
I would be very grateful if someone could help out.
Edit: I forgot to mention that one of my banking apps is now unusable as it crashes over and over again since I've installed the Global Rom. Don't know if it's related to the issue, but it worked just fine beforehand.
Check out my thread.
I'm also on 10.3.5 and think the issue is software related.
After reading your post, I'm thinking we may have something similar going on. My phone is working fine with no problems reading the SIM card after a factory reset a few days ago.
Hopefully you don't end up having the exact same problem I did.
I also have the same problem, I have to take out the SIM every time I reboot, I have the derpfest ROM and so far I have not been able to solve the error.

"No SIM card detected" & "No service"

Hi all,
I have a problem with my XC, i hope there's someone here who could help me out with this .
I get a SIM card error when i start the phone. After a while (5-10 mins) the error transforms into "No Service" as if the phone now detects the SIM card but has no service whatsoever.
Things i did to my phone prior to this:
- unlocked bootloader
- installed custom recovery
- root
- installed custom ROM
- drm fix
The phone did function properly for a few months actually after these operations without a SIM card error even once. But then i tried to install custom ROMs again (and i'm sure didn't flash ROMs not suited for XC) -actually tried to install "existenz" ROM but i did get a bootloop so i -once again- did the usual procedure with flashtool and flashed a firmware to set everything back to stock as close as possible. That was, when i started to get the SIM card errors. After several restarts (cold and warm) the phone sometimes recognized the SIM card and i could use the phone normally. But this was true only till the next restart, where i got the same SIM errors again.
Things i tried:
- flashed several different firmwares (official) with flashtool (wiping everything) - all the newest firmwares.
- *#*#72786#*#* in dialer to wipe carrier settings
- *#*#4636#*#* in dialer to go into phone settings and changing those settings randomly
- flashed another AOSP based custom ROM instead of stock sony
- wiping and formatting everything between the flashes of course
- cleaning and re-inserting SIM card (which i never took out before anyway)
But unfortunately nothing worked. Phone keeps to not recognizing the SIM card (which is working just fine in another phone). Everything else works just fine on the phone. The IMEI is displaying correct. I'm almost certain that the fault isn't hardware-based (i didn't drop the phone or exposed in water etc.) but software-based. Did i just managed to brick my phone by flashing something related to the modem which i'm not aware of?
I can't find any solutions on google, which help me, which is why i'm posting it here. Sorry for the long post.
Did anyone experience such an error and/or knows what else i could try to fix this? I hope for answers
Thanks in advance!
Anyone?
I've got the same problem.
I didn't unlock the bootloader or anything prior to getting the bug.
I wanted to downgrade to nougat, because aparently it helped someone in the forum below, but I didn't manage to do it.
https:// de.ifixit. com/Antworten/Ansehen/468864/Sim+Card+not+picking+up+mobile+network.+Possible+software+issue+(Oreo)
Did you try nougat, when flashing different firmwares?
Your post makes me question if its worth it, trying to downgrade.
Try to remove sd card if you have one. then restart the phone and see if sim card is recognized.
I had the same problem and I think it was a hardware failure in the end.
I also tried almost all the things you were writing above. In my phone it started slowly. Sometimes the SIM was detected but after some time the connection was lost.
It happened some time after I installed a new battery.
But since there are no original batteries available for the device anymore and the new battery was even worse than the 5 year old original battery, I gave up investigating the SIM issue and don't use the phone any longer.
I bought a new (used) x compact because I still like the size and I saw some development was going on for this device.
In the end I cannot tell whether the SIM was not detected because I broke something while changing the battery or due to age of the phone but I think it was a "normal" failure.
I also read from others that they had the problem and the SIM was working for some time after I switched the battery before it stopped working.
Nevertheless. Good Luck to you. Maybe it is something different on your phone.

Cannot update my baseband

Hi everyone.
I have a problem with a Samsung S4 GT-I9505 which I bought as used. The phone came with stock rom, and with baseband I9505XXUHOJ2.
Then I updated it to the latest stock rom for my country, which is I9505XXUHPK2-ITV, with Odin. After reboot and factory wipe everything, the phone info shows build LRX22C.I9505XXUHPK2, but baseband is still I9505XXUHOJ2, which according to letter coding, should be previous.
This phone does not register SIM, nor see the SDCARD. Thinking it was damaged, I even changed the sdcard+sim slot with a new one, without success. I suppose the baseband may be the cause of missed SIM registration to the network.
What do you think is preventing the baseband to be updated? I'm out of clues
Never mind. I finally updated baseband reiterating Combined Modem+NON_HLOS flashing. However I did not solve the problem with SDCARD and SIM
micchese said:
Never mind. I finally updated baseband reiterating Combined Modem+NON_HLOS flashing. However I did not solve the problem with SDCARD and SIM
Click to expand...
Click to collapse
Hello,
Check my S4 Unified Collection & Guides and follow the steps of the Guide Clean Install Official Stock ROM.
Sir, I followed your guide step by step. Now I have Stock-rom XXUHQK1, and the same for the baseband.
Unfortunately, the SIM and SDCard is not detected. I think it's an hardware issue. I have other S4 I9505 phones and they behave differently than this one.
micchese said:
Sir, I followed your guide step by step. Now I have Stock-rom XXUHQK1, and the same for the baseband.
Unfortunately, the SIM and SDCard is not detected. I think it's an hardware issue. I have other S4 I9505 phones and they behave differently than this one.
Click to expand...
Click to collapse
If that is the case, it's relatively easy to replace the SIM card tray, provided the part is still available for purchase from Amazon or similar sites.
Strephon Alkhalikoi said:
If that is the case, it's relatively easy to replace the SIM card tray, provided the part is still available for purchase from Amazon or similar sites.
Click to expand...
Click to collapse
As I said in the first message, thinking it was damaged, I even changed the sdcard+sim card tray with a new one, without success. So the problem is not the card tray afaik.
When you swapped out the tray did you transfer to the new part the foam pad that sits atop the connection to the motherboard? If you didn't do that, you will have problems, especially the SIM not being recognized.
However, the foam doesn't result in an immediate disconnect but a gradual one. So, we have a few different possibilities here.
1. The SIM itself is damaged.
2. The device was unlocked by its previous owner using a service menu exploit, and when you restored the firmware you wiped the exploit.
3. The EFS partition is corrupted or lost.
The first can be easily tested.
The second? I ran into this exact issue myself: at the same time my SIM tray failed, which made resolving things challenging. It can be remedied by downgrading to an Android 4.2.2 ROM and running RegionLock Away by Chainfire.
The third? That one only Samsung can help with, as the EFS partition stores the IMEI and NV RAM of the S4, and unless you ran Wanam Partition Backup beforehand, there's no way to restore it.
With the premise that my problem is not limited to the SIM, but involves also the SD Card which is not detected when inserted, let me reply to your points:
1) The SIM is good and valid, as it registers to the network in another S4 I9505 which is fully operational
3) Before upgrading, I installed TWRP and made a backup of EFS partition. After checking the new EFS partition with the old, there are no differences beside a few bytes here and there, however nothing which reminds me an IMEI (they seem more like file date updates in filesystem)
2) Can you be more specific here, I never heard of this before. The previous owner, once contacted said he used this phone as daily driver until 2018. He live in my same country, and the stock firmware should have nothing locked or needing an exploit. Again, provided this would prevent SIM from registering, do you think this could also influence SD Card too?
I'm more and more concerned that the problem is hardware related. Pressing the SDCard slot connector to the mainboard, like other users have reported successfully, didn't change anything. Maybe the mainboard isn't giving the SDCard slot the correct powerage. I have seen on eBay other mainboards sold as not working with this very same defect, wifi working and SIM not registering.

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