Xperia Z C6603 : Network signal issue(Full signal but wont receive or able to dial calls)

[Cyril15j]

I have to bring up this topic again, My xperia z has the same problem. Im not able to make calls or recieve them I'm afraid of keeping my phone out of sight as my phone's problem is so deceptive, although it shows full network, it will not be able to connect to the network, the phone is troubling me a lot. I s it the firmware that troubles us?

[Thommo]

Bring this up again - So you have two accounts?

[Cyril15j]

no im a diffferent user, i already saw the post thats why i said it. o you know how to fix this?

[Thommo]

Try performing a system repair using PC Companion as this will often fix issues - This will factory reset your phone and erase all data so best to backup before you begin

Switch off your phone and unplug from Pc (Hold volume up and power for around 10 seconds)
Start PC Companion and select Support zone then Update my phone/tablet then in Blue Repair my phone/tablet and follow the on screen instructions - When prompted connect your phone still switched off holding volume down or back button - This should start the repair or reformat process

If you are using Windows 8/8.1 or a 64bit operating system then adjust the settings for PC Companion and run in compatibility mode and chose Windows 7 or XP

[Cyril15j]

Its not helping me, the phone works after  Iconduct a restart, later then it starts again. The problem is very deceptive, your phone shows full network yet you cant make calls or anything

There is no problem with the sim card. as it has been tested in other phones, even after that I changed it, still the problem persists.

[Cyril15j]

I have an xperia c6603 with a vodafone sim Mumbia, the phone only works on themobile network mode selected as GSM only, it doesnt work on WCDMA. Please help, This problem began suddenly on a fine day. What is the solution?? Please help