At a loss over signal loss.

[gigapus]

I have an annoying signal loss problem that has been on-going since 4.4, seemed to get a bit better with 5.0, but is bad again with 5.1. At random intervals the phone just loses all signal, as in no bars at all (just an empty triangle), and not even a provider showing. It does say "Emergency Calls Only" in the titlebar, not "No Service", suggesting it actually has signal. This is exactly what it does with no SIM inserted, but I have tried different SIMs to no avail. Eventually it does come back again by itself, but restarting the phone always fixes it straight away.

I can also trigger this behaviour by making a call. Sometimes it works, but sometimes as soon as the call connects, the signal does as described above (so naturally the call drops).

I have googled this for hours and found some problems that sounded similar, but no suggested fixes made a lasting fix on mine. One suggested fix was to clear cache and data for the "Phone" app, force stop, then restart. However, I noticed I have 3 apps labelled Phone. Is this normal? I did the clear/stop/restart on all of them, and that possibly helped for a while, but it started doing it again.

Has anyone seen or heard of anything like this?

 

[control freak]

the network problem is very troublesome. I now use two phones, one specifically for calls, and one this X ZL. Mine has a bit different problem. it doesn't catch good signals, and while on calls, it automatically loses signals. the call quality is also poor, i tried different sims, but to no avail. my 4 year old Samsung champ gives loud clearer calls on the same sim on the exact same location at the same time where my ZL fails to deliver. i wish we could change the hardware network module

 

[danieldp1990]

I have an annoying signal loss problem that has been on-going since 4.4, seemed to get a bit better with 5.0, but is bad again with 5.1. At random intervals the phone just loses all signal, as in no bars at all (just an empty triangle), and not even a provider showing. It does say "Emergency Calls Only" in the titlebar, not "No Service", suggesting it actually has signal. This is exactly what it does with no SIM inserted, but I have tried different SIMs to no avail. Eventually it does come back again by itself, but restarting the phone always fixes it straight away.

I can also trigger this behaviour by making a call. Sometimes it works, but sometimes as soon as the call connects, the signal does as described above (so naturally the call drops).

I have googled this for hours and found some problems that sounded similar, but no suggested fixes made a lasting fix on mine. One suggested fix was to clear cache and data for the "Phone" app, force stop, then restart. However, I noticed I have 3 apps labelled Phone. Is this normal? I did the clear/stop/restart on all of them, and that possibly helped for a while, but it started doing it again.

Has anyone seen or heard of anything like this?

check if antenas are correctly connected. https://www.youtube.com/watch?v=7yADs4OsAXg