Unable to switch GSM

[saint21]

On my Z3 I have no signal. In the service menu * # * # 4636 # * # * I found that the radio is turned off. After pressing the button to turn on the radio, nothing happens. Please help. Thanks for any help.

[Uliwooly]

@saint21

What if you restart the phone or repair the phone with PCC? have you rooted the phone or unlocked the bootloader? is the phone compatible with your network carrier? is or was the phone locked to a carrier/network?

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

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

[saint21]

Restarting via the PCC did not help. I have done bootloader. The phone is compatible with telephone networks. The phone should not be locked to an operator.

[Uliwooly]

@saint21

When you say

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@saint21 wrote:

... I have done bootloader. ...

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What do you mean by that? 

[saint21]

The bootloader is unlocked. I tried to upload a different ROM.

[Uliwooly]

@saint21

Well there you, flash Sony's ROM again, if that doesn't work you might want to post on the XDA forum. 

[saint21]

I wrote at XDA. Nobody helped me. The ROM from Sony?

[Uliwooly]

@saint21

Use flashtool, download the ftf file, flash your phone. 

[saint21]

I understand that, but that is good? I tried D6603_23.1.A.1.28_Baltic.ftf and it did not help.

[saint21]

How do I find out if the phone is locked?