Problem with signal sony z2

[Izaaa]

Hello I have problem with my Sony z2 I have weak mobile signal after update to new android 5.1.1 build number 23.4.A.1.264

Before updates signal was better.

[Uliwooly]

@Izaaa

If you base it on the bars that's not the way to go, as they don't really represent the signal strength, that goes for all phones. 

settings > about phone > status > signal strength, check here and also check with your carrier if there are any network connectivity issues.

[Izaaa]

when I put sim card in old Sony L I have signal. The same is when I put in iphone i have signal. When I put in Sony z2 the same sim is no service. Before update I had good signal I try put different sim still is the same. How can I install old version android, when I bought phone I had android 4.4

[Uliwooly · Accepted solution]

@Izaaa

You can't unless you use flashtool or xperiafirm or contact your Local support

If I was you, I would repair the phone with PCC

software repair

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[Izaaa]

After repair software signal is better. Thanks for help  

[Uliwooly]

@Izaaa

anytime