Phone reboots itself when loss signal - Xiaomi Redmi 4X Questions & Answers

Hi. My phone keeps restarting itself when the signal lost (Examples: out of lifts, basements and etc). I've updated the firmware to the latest one, V40 and already even try the previous firmware V37. I'm having this issue when using custom rom and even Miui stock rom. Does someone having the same problem with me?
I think the main culprit have to do with the phone trying to search for signal and it goes into a power cycle.
Thank you.

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3g\edge\wifi BIG trouble. PLEASE help!

Hello!
I have big problems.
The fact is that recently I have started a problem with the wifi: icon appears and disappears constantly, the phone tries to reconnect and lose the connection. signal is excellent. I thought that things in the firmware (Super D 1.11), but I haven't time to deal with it.
Now I have started the same with 3g/edge. Icon disappears every 3 seconds, then it appears again and disappears. Internet use is not possible, the phone due to constant reconnections began be slow and very fast mount battery.
At first I reflash same firmware. It did not help. Then flash a few more firmwares - no. Then I thought that problem in OTA, and tried to flash to ota-radio-2_22_19_26I, but to luck, because I have it before.
Now I don't know what to do, use the phone is impossible, I suspect that he just broke down. Can't use guarantee, living in Ukraine.
Help please.
P.S. Sory for my english.
someone ??
have you tried a wipe and a flash of the newest radio? The newest radio version is 2.22.23.02 and can be found in the first few pages of the development section. It might be a hardware issue if those two don't fix it.
Just flashed it. Didn't help

[Q] Signal Issue

I flashed omars rom about a week ago and everything was going great until this morning. I woke up and have no signal at all. Rang my operator, they said there's nothing wrong with the network. I've tried everything I can think but nothing. I've flashed different roms, kernels and ended up using rsd lite to go back to stock, and still no good. Anyone have any ideas? Any help would be greatly appreciated!!
It can be hardware issue. If flashing full stock rom didn't help it shouldn't be software issue.
Download any app to enter radio settings and change to only 2g but it must be changed in radio settings, not just phone menu setting. If it wint help on stock full rom for 90% it gonna be hardware issue.
Wysłane z Motorola RAZR i.

Z3 Compact - How to ONLY update baseband (having "sim" loss issues)

Hy guys,
I'm facing some issues with my Z3C. I bought it 2 weeks ago, unlocked bootloader, installed twrp, flashed CyanogenMod 12.1 Nightly on day 3. Updated CM twice with OTA since then.
My problem is that the "sim" card (GSM/LTE) is randomly not noticed by my phone, like if its removed. I checked the sim tray, everything is stable and well seated, the sim is also OK, never had an issue with it. I just have it in my pocket or on the desk, pick it up to do something and there is already a No SIM icon on the status bar, and "Emergency calls only" If I lock the phone. Only a restart solves it.
I could not find any noticeable trigger which would lead me to the source of the problem. Sometimes its OK for 2 days sometimes it happens 2 times a day. The really frustrating part is that when the sim "disconnects" the phone starts to heat up significantly. I usually only notice it because my phone is burning my pocket. Also it looses around 20% battery before I notice it. After the restart everything is fine, the phone cools down.
Went to the Cyanogen forums for some possible solution for the problem, they suggested that I should try to update my baseband to the latest version, and if that still doesn't help, do a full wipe / clean install of CM nightly. I tried downloading the latest firmware using FlashTool and XperiFirm, creating an ftf, and flashing only AMSS_FSG, AMSS_FS1, AMSS_FS2 included into the flash ( I only wan't to flash the baseband ?!?).
My question would be: Anyone else had this problem and managed to fix it somehow? If not, anyone could please help me with a small guide how to ONLY update the baseband of my Z3C (D 5803) running CM 12.1 nightly on twrp recovery?
When I tried the flash above, my baseband version did not change. Currently I'm on "8974-AAAAANAZQ-00005-40" Baseband version, and I would like to move to the latest most stable one.
Thanks for the help in advance!
If it were my Z3c, I would flash back to stock completely and then reflash with Cyanogen. This is a device on which you have the freedom to do that, and that gets the job done safely. Backup your CM install, and then flash everything.

Mobile Network /Cell standby drain with every rom

Im writing this because my battery life got really bad, and please don't start saying it's a ROM, Google or some apps I've installed issue, because I got this problem with basically every rom, starting from stable, dev MIUI ti LOS15.1.
As you can see from the pictures I get "Mobile network standby drain" in every rom, (In MIUI is called Cell standby)
So i thought It was a firmware issue and I changed, reflashed It and formatted a lot or times but no luck.
So at this point I thought that was an Android way to tell me my battery is diying, but I don't really understand, I also got an android wearable device but this problem persisted even before I bought it.
I've also attached a bugreport
2h of screen are also good for what I got usually, other days I can reach the end of the day 20% with 1h and 30 of screen.
Seems like I solved in LOS15.1 by flashing the latest firmware from the latest dev package from xiaomi, replacing the files on the firmware flashable zip which some guy posted, but not updated it.
lukypuie said:
Seems like I solved in LOS15.1 by flashing the latest firmware from the latest dev package from xiaomi, replacing the files on the firmware flashable zip which some guy posted, but not updated it.
Click to expand...
Click to collapse
So, did it help? Please be specific what exactly did you do.
Set the principal SIM(The SIM that you use mobile data) to 4G Network mode and the secondary SIM to GSM or 2G mode.

Losing signal after MIUI update to 12.5.4

Hello guys.
I need help asap.
today after updating to the latest stable release (MIUIU 12.5.4) I started experiencing problems with the signal coming on and off every two or three minutes. It loses both gsm and 4g services.
I tried removing the SIM card, restarting, updating the android web view, everything.
has anyone Experienced something similar ?????
thanks
How did you flash the update ?
i just used the official miui updater.
My phone is not even rooted
zzhor84 said:
i just used the official miui updater.
My phone is not even rooted
Click to expand...
Click to collapse
Did the issue fix itself?
I am encountering the same issue and looking to know if it is a phone thing or an update issue.
I factory reset the phone but the issue is still occurring.
I tried downgrading to 12.5.3 but it didn't work. Seems like roll back is prohibited at my phone.
The issue stopped occurring for approx 9 days and yesterday without doing anything it started reoccuring and has not stopped since.
The issue keeps reoccurring even in safe mode.
I am totally confused. I don't know what to do
The same issue with mine also after updating to 12.5.4. The phone can't be used while every 2-3 minutes disconnects from network. Any ideas?

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