Unstable cellular signal since update to 5.1.1

[Aljecama12]

Hello guys, since I updated my XZL to 5.1.1 India I have seen some signal trouble, never get the 4 bars and changes from 3 to 1 or 0 every moment. I have the same mobile carrier (Telcel) on a XZ3 and the signal is full (4 bars) while the XZL is like 1 or 2 bars

This is the actual version installed on XZL

 

[control freak]

did you try a clean install? if not, i'll say give it a shot. but backup your data first.

 

[Aljecama12]

did you try a clean install? if not, i'll say give it a shot. but backup your data first.

I have made the clean install of eXistenZ 3.5 and stills the same, what do you mean with give it a shot?

 

[control freak]

I have made the clean install of eXistenZ 3.5 and stills the same, what do you mean with give it a shot?

Lol, Give it a shot means try that.
Also, i am a stock rom guy, i can't help you much regarding custom rom.
You can try stock rom to verify it's not caused by a hardware issues.