Having a Q - Xiaomi Mi A1 Questions & Answers

Hi guys! I just have one question. I was wondering or I doing something bad or this is just a phone problem. So after flashing any custom rom, I have weak data, sometimes i can call only emergency numbers. So this is my problem when i flashing custom rom, or this is phone problem. Anyone facing same problem? Have a good day! :fingers-crossed::fingers-crossed:

Any custom ROM? Thats strange... I didnt face any of these problems, what about going to the SIM settings and set prefered network to 4G? Maybe it is set to 2G. If you flash back to stock, do you still face the problem?

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[Q] Network Issues

Greetings all at XDA Developers
I am having a very serious problem with my Galaxy Y. My phone keeps on going into Emergency Only mode intermittently. For example it will have signal when I go to bed and then when I wake up it will be on emergency only. It also happens randomly during the day and the only way to rectify the problem is to restart my phone.
I did have a custom ROM and that is where it started, I then installed another ROM and the same issue occurred. I then decided to flash my phone to stock firmware (it is still on a custom kernel) yet it is still happening.
If anyone could help on this problem it would be greatly appreciated.
Thanks
c0sm1kSt0rm said:
Greetings all at XDA Developers
I am having a very serious problem with my Galaxy Y. My phone keeps on going into Emergency Only mode intermittently. For example it will have signal when I go to bed and then when I wake up it will be on emergency only. It also happens randomly during the day and the only way to rectify the problem is to restart my phone.
I did have a custom ROM and that is where it started, I then installed another ROM and the same issue occurred. I then decided to flash my phone to stock firmware (it is still on a custom kernel) yet it is still happening.
If anyone could help on this problem it would be greatly appreciated.
Thanks
Click to expand...
Click to collapse
maybe the problem is your sim card but i'm not sure...
keeps happening to SGY users i dont know why but i conclude this because some of my classmates use the same unit also my 2brothers experience both in stock rom at Custom ROm dont know how or why? we have all different kind of baseband but still it occure for me sometime oh dont know why
blackpanther2209 said:
maybe the problem is your sim card but i'm not sure...
Click to expand...
Click to collapse
I thought of that as a possibility. It could be but I doubt it. The SIM is only about a year and a half old. I think it could have been some dodgy configuration with a custom ROM that is still somehow present
R u sure when you flashed stock Rom it was the version you had originally
So 2 android phones walk into a bar

[Q] Data Drops During Calls. Please Help.

Hello guys. I have the n900t, I am now running tweaked s5 base n4 style v6.0. And I run alot of n9005 ROMS as well. With that said here is my issue. For only the past few weeks ( month tops) every time i make or recieve a phone call my data drips down to hspa. The second i hit call and right before my phone rings is when it happens. After my call the data takes a very long time to jump back up. This is a new issue and i have no idea what it is. However, i did flash back to a stock ROM and the issue was solved. And i forget which rom it was but it was soley TE based and there were no issues. I did try to flash a modem but it didnt take. Is anyone else experiencing this problem? Or can anyone suggest a fix for it.
Thank you for your help.
bump.
Still having the issue. I tried to flash a new modem and it just failed anyway. Dont know if I should try a radio. I just cant fivure out why this happened out of no where. I was fine no matter what ROM I was running. Now...this crap. Please guys, 40 people saw this, can SOMEBODY please help.
mattdiehl83 said:
Still having the issue. I tried to flash a new modem and it just failed anyway. Dont know if I should try a radio. I just cant fivure out why this happened out of no where. I was fine no matter what ROM I was running. Now...this crap. Please guys, 40 people saw this, can SOMEBODY please help.
Click to expand...
Click to collapse
1) Quite strange - your picture suggests you are on Verizon yet you comment about a N900T in the forum for the INTERNATIONAL Note 3. On what network are you? Are you aware that there might be network-specific factors involved which could only be visible for other users on exactly the same network in exactly the same region?
2) Try stock ROM (with corresponding stock modem) from a location with very good signal.
5 he physical device is an n900t, however, I am running as of now, the hyper drive note 5 port with n4 UI. When I do flash back to a full stock TW ROM all is good, A FEW TW based ROMs seem to be OK. Like this one, the calls do not affect the data signal. But most ROMs do effect it in that way. You said that it shows I'm running Verizon?
But I am very curious why all of the sudden I am having this issue. I have never had it before. Except with a few specific AOSP based ROMs. I just can't figure out what it is that's causing it. I have done vigorous wipes of the phone to no avail.
And I am in Philadelphia so there really is no place that is actually bad reception (except in the susubways of course...lol)
And thank you for your reply.
mattdiehl83 said:
5 he physical device is an n900t, however, I am running as of now, the hyper drive note 5 port with n4 UI. When I do flash back to a full stock TW ROM all is good, A FEW TW based ROMs seem to be OK. Like this one, the calls do not affect the data signal. But most ROMs do effect it in that way. You said that it shows I'm running Verizon?
But I am very curious why all of the sudden I am having this issue. I have never had it before. Except with a few specific AOSP based ROMs. I just can't figure out what it is that's causing it. I have done vigorous wipes of the phone to no avail.
And I am in Philadelphia so there really is no place that is actually bad reception (except in the susubways of course...lol)
And thank you for your reply.
Click to expand...
Click to collapse
1) Your avatar mentions Verizon for some reason.
2) If it is all OK with the stock ROM then it is a problem with the custom ROM, ask in the specific thread for that specific ROM. Most likely it has something to do with the modem and the corresponding RIL.
So when ever a new ROM is flashed the modem is flashed as well. Unless the dev says otherwise?

[CLOSED]No Signal and No service after flashing custom roms and mods.

Couldn't get the help i needed . I am about to repost this in Discussion Forum . Thanks everyone for replying !
try flashing the stock rom...maybe u would get it with that..the again flash your desired custom rom
I have the same problem bro. In my case, I lost the Volte facility due to this and I only have the 4g LTE now which can just be used for internet. Follow the steps at https://forum.xda-developers.com/g5-plus/help/restore-imei-0-moto-g5-xt1687-t3739808 to get back your signal. As for Volte, there is no fix as of today.
Thanks for trying to help.. Really appreciated.. But i didn't lose my IMEI number
I have the same problem but on my 4g plus my sim won't work with custom roms as it's a cdma sim only ones that do work are stock custom or stocked tweaked roms so what you can try to do is go back to stock and see if your Sims work again.
I had the same problem. FIXED installing crdroid 7.1.2. Latest firehound works intermittently. Sometimes it works and sometimes just doesn't show any sim.
I can get the signal back ..but it's doesn't work forever... As miguileto133 said !!! ..sometimes signal comes back after wiping cache. But it doesn't always work..So I am gonna try flashing stock then again Will try to flash custom ROM ..if it again fails to get network.. I'll have to choose stock for life ...which I don't want :'(

Problem with LTE connection after flashing a custom Rom.

Hi guys,
I flashed custom rom (Pixel Experience) and everything works very well and stable.
However, I have one problem with this Rom, LTE doesn't work at all (only 3G/HSPA+).
I tried to flash soft again without success. I also tried to upload FireHound Rom also lack of LTE.
Even when I try to force it by a command *#*#4636#*#* there is no signal, though I'm in LTE range.
On the stock Rom I had no problem with LTE.
Does anyone have a similar problem?
How can I fix it?
Thank you so much for help guys.
Check your apn settings & set your prefered network on 4g or LTE

MI A1 Network fluctuation with custom ROM

Hey Folks, as we all know how stock ROM sucks, I remained on custom ROM to max extend. But sadly I have to revert to stock due to network fluctuation issues. I use Jio as my primary and Airtel in SLOT 2. Fluctuation is widely seen in slot 1 which is reported by many others as well in respective ROM thread.
I have tried methods flashing custom modem image and network signal guru. But none seems to fix the case.
Anyone aware of other methods to fix the network fluctuation issues seen in custom ROMs? May be using any custom kernel?
Please help me to remain in custom ROM!
Cheers,
Hari.
Same here all cust rom has this network fluctuation issue and it is to do with the code. It seems if any one can fix this. It will be great..
haariseshu said:
Hey Folks, as we all know how stock ROM sucks, I remained on custom ROM to max extend. But sadly I have to revert to stock due to network fluctuation issues. I use Jio as my primary and Airtel in SLOT 2. Fluctuation is widely seen in slot 1 which is reported by many others as well in respective ROM thread.
I have tried methods flashing custom modem image and network signal guru. But none seems to fix the case.
Anyone aware of other methods to fix the network fluctuation issues seen in custom ROMs? May be using any custom kernel?
Please help me to remain in custom ROM!
Cheers,
Hari.
Click to expand...
Click to collapse
The same, please helppppppppppppppppp!!!!
Noticed the same on Vodafone AU, no matter what network mode I set it to. Even on 3G only I get drop outs and fluctuations.
I'm hoping it's just some extra modem related package or service missing from the vendor blobs, but I've not had time to look into it yet (with my limited skills in this area).
For me also lot of fluctuations. Sometimes totally black signal bar. Hope somebody can fix it. I fixt it for now with automate and set network to 2g when on wifi and after lock screen when I am on mobile network.
Modem zip in forum don't solve it for me and also lock some bands with signal guru didn't do the trick.
Hope somebody can solve it a lot of people are suffering this problem.
daveve said:
For me also lot of fluctuations. Sometimes totally black signal bar. Hope somebody can fix it. I fixt it for now with automate and set network to 2g when on wifi and after lock screen when I am on mobile network.
Modem zip in forum don't solve it for me and also lock some bands with signal guru didn't do the trick.
Hope somebody can solve it a lot of people are suffering this problem.
Click to expand...
Click to collapse
Has anyone tried using custom kernel? Just curious on if any custom kernel fix this.
Same issue I have been facing, I had re-partitioned my device for Treble using CosmicDan's guide so that I can try all the best custom roms out there and get all updates as they are released but when I faced this issue, I had no choice but to revert back to Android One rom, undoing all the process
haariseshu said:
Has anyone tried using custom kernel? Just curious on if any custom kernel fix this.
Click to expand...
Click to collapse
Nope change kernel don't solve network problems it has something to do with the modem.
https://forum.xda-developers.com/mi...nel-r1-android-8-0-beta-t3758768/post76859233
Bump
Sent from my epic G900F (CM11, [emoji173]️ Holo Dark) Gadget of Mass Destruction using Tapatalk.
What is weird is sometimes network stable when updated the rom... And goes back fluctuated the next update...
awandroid89 said:
What is weird is sometimes network stable when updated the rom... And goes back fluctuated the next update...
Click to expand...
Click to collapse
Probably resetting modem settings, assuming you've made any.
China only uses maybe 5 bands, and most of the population doesn't often travel far from home; so roaming and tower switching isn't an issue. That, and a power management issue I think are responsible for our network issues.
My money is on these devices working perfectly in the motherland.
Faced the same , almost on every custom ROM .Jio 's volte doesn't work most of the time. Switched to January stable stock twrp with magisk . Now everything is stable , no volte issues at all .
Now my question is , the issue is with ROM or modem file ? As you guys are saying that it is a modem issue ..as now I am on January stable modem , I will try to flash a latest build of any custom ROM and will report .
sikoo1996 said:
Faced the same , almost on every custom ROM .Jio 's volte doesn't work most of the time. Switched to January stable stock twrp with magisk . Now everything is stable , no volte issues at all .
Now my question is , the issue is with ROM or modem file ? As you guys are saying that it is a modem issue ..as now I am on January stable modem , I will try to flash a latest build of any custom ROM and will report .
Click to expand...
Click to collapse
Can you post January modem file twrp flash able?
kemdroid said:
Can you post January modem file twrp flash able?
Click to expand...
Click to collapse
There's a TWRP flashable May modem patch somewhere in the MiA1 forum. I've flashed it and the results aren't perfect, but circumstances have improved.
I have tried all March, April and May modems and all have problems with custom ROMs and network fluctuations for me. (IND Airtel operator) and even 3G is fluctuating with state owned BSNL. January is the only one I haven't tried which I will after getting a reply from sikoo1996.
I have very limited knowledge of these matters and so far all my attempts with dialer code menu or settings or Network Guru have all failed. Guess I will ditch this phone and stick to my S5.
Sent from my epic G900F (CM11, [emoji173]️ Holo Dark) Gadget of Mass Destruction using Tapatalk.
kemdroid said:
Can you post January modem file twrp flash able?
Click to expand...
Click to collapse
I flashed sooti's stock twrp zip (which includes modem), I don't know if it can be made a seperate flashable zip.
---------- Post added at 05:34 AM ---------- Previous post was at 05:33 AM ----------
hnkotnis said:
I have tried all March, April and May modems and all have problems with custom ROMs and network fluctuations for me. (IND Airtel operator) and even 3G is fluctuating with state owned BSNL. January is the only one I haven't tried which I will after getting a reply from sikoo1996.
I have very limited knowledge of these matters and so far all my attempts with dialer code menu or settings or Network Guru have all failed. Guess I will ditch this phone and stick to my S5.
Click to expand...
Click to collapse
Rit now I am on jan stock build , means on Jan modem .I will flash a custom ROM now ..later today and will report back about the issue .
Cheers?
I dunno if it actually works for everyone but,
Swapping the SIM card slot worked for me.
Using RR latest. I also flashed stock modem.img but that didn't fix the problem then. It's fixed now by swapping SIM slot.
Hey guys. Try flashing the latest modem and then, go oh ahead to *#*#4636#*#* and select network mode to TD-SCDMA/CDMA/UMTS . ?
https://forum.xda-developers.com/mi...nel-r1-android-8-0-beta-t3758768/post76886544
As @methuselah pointed out, there is a more appropriate place for this conversion.
Please read through link and respond to this thread.
@flex1911, I'm sorry for straying so far off topic for long. I'll copy and paste necessary posts here asap, Within the day, so that they may be scrapped or deleted there.

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