hve problem with 3g-4G - Xiaomi Mi A1 Questions & Answers

Need QPST original modem file. I broken settings ( and now after i turn on 3G A1 rebooting. pls help /

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no network help

guys can anybody tell me what happen to my xda mini, there is no network signal... i have tried to change another sim card but no luck..i tried a hard rest but still the same no signal... is my pda broken? what shall i do to have my signal again.. pls help.. tnx
I had similar problem. Could not identify the exact reason but pls try:
1- change network from Automatic to GSM (i.e. avoid UMTS due to bad signal)
2- if above does not work you can try hard reset.
tnx lii try it out.. hope it will work..

[plz help] Unable to change network mode Karbon a9+

Unable to change network mode Karbon a9+
My friends please help me, i am unable to select network mode in my karbon a9+ it stuck at gsm only option and i unable to select wcdma or auto gsm wcdma option, i have rooted my phone and it running on official 4.04 ice cream sandwich, some days ago it working fine but not now i try my friends karbon a9+ with my sim and everything is ok, i try with hard reset, using darkboad and hyperion skyfall rom but no luck, i also try some software like 3g network fix but problem not solved plz help me my friends if you have also same type problem or any suggestion-solution,

i9505 dont connect 3g

the device has changed imei. 3g not connected in any way . im several different custom rom instaled but never connect 3g network . only 2g gsm connected. how to fix this problem help me please.
Does not anyone to help me
Had some problem like yours just now. No matter how I flash my phone, changed my modem, it is stuck at 2G (Edge). Then I went to Settings>More networks>Mobile Networks and changed my network mode from LTE/WCDMA/GSM(auto connect) to WCDMA/GSM (auto connect) and then it becomes H+ again! Hope it helps!!
Unfortunately, not the solution. I m selected just a WCDMA I get the message "no network" I load different roms but Unfortunately, the same result
I have the same problem and I've been all day trying to fix it without success, the problem started after installing the 4.3 rom I9505XXUEMJ5.
Has anyone who found a solution to this issue ?
help please
no 3g
me too i have the same problem, i dont have 3g connection after flashing any custom rom

Bootloop (restart , only logo) lg e900 problem solved.

If you lg optimus 7 e900 have this problem - still restart and only show lg logo , this mean that you phone have installed wrong radio firmware version . Newest radio firmware ( that support tethering ) have some bad structure and it is not hardware problem but firmware.
If you have enabled Pin secure code and enabled "automatic mode " in MFG at modem setting where you choose WCDMA and GSM band ,
phone will be restart after next turn on the phone . So you must install older firmware that have older radio firmware , of course it can be update to wp 7.8 ( tango ) . First install this older firmware :
LG-E900AT-00-V10c-268-FFF-OCT-07-2010+0_DZ_PROD.dz ( with lgdp2 v33 or v36 )
and you can update this firmware via Zune to 7.8 wp tango . This firmw. have not some languages but it is easy to install ( find oder posts about modification registry to change language ).
Second solution to fix restart problem - you can change Modem setting at MFG and choose yours band (your operator of course , for example orange poland - choose wcdma 900mhz , or 2100mhz , gsm 1800 or 900mhz , if you enable automatic mode and enable pin security for sim , phone will be restart again - bootloop problem ) .
Another solution is detachment upper (second) mainboard from primary mainboard phone ,and switch on the phone without this second
mainboard (wait 40 second , you see phone stop restart ) . This is illusion that problem is wrong upper mainboard .
Next connect upper mainboard to primary mainboard and switch on phone . If bootloop problem return , change modem setting at MFG
with your band .
Best method to fix - restore NV items , not difficult (see my another topic ).
Thank you!
Sent from Board Express on my Nokia Lumia 1020. Best phone ever!!
Note to noobs: DON'T PM ME WITH QUESTIONS. POST IN THE FORUMS. THAT'S WHAT THEY ARE HERE FOR!
Thank you sir...
i just got my fone with these headbleeding problem...
thank you, i`ll try these method little later.
i`ll post fotos for further development later

Lost IMEI No and In WiFi nvram warning error = 0X10 showing

i was trying install stock rom while doing it i selected fomat & download option in sp flash tool which i think cause of this problem
i installed that rom but this eroor is occured and i cannot find any solution on it plz plz plz help
it shows Invalid IMEi at place of network operator i typed the code for imei but there is nothing ther no single code.
how to solve this problem please help
will fix the imei
tejeshshinde said:
i was trying install stock rom while doing it i selected fomat & download option in sp flash tool which i think cause of this problem
i installed that rom but this eroor is occured and i cannot find any solution on it plz plz plz help
it shows Invalid IMEi at place of network operator i typed the code for imei but there is nothing ther no single code.
how to solve this problem please help
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