Hi.
My problem is that I have no signal when I put my sim into my phone (Xperia Z3+) however I'm not sure if its a problem with my sim or not. I'm leaning towards not but would like some opinions. It all starts about 2 months ago when I was having issues with my phone losing wifi and then not getting it back until several restarts and a couple hours later.
So I sent it to Sony for repair as it is still under warranty. But as it had some cracks on the back glass they charged me to replace that (which I expected). They sent it back to me and it still didnt connect to the wifi but this time no amount of restarts helped. Then they sent it back saying the mainboard had been replaced which I think is important to my issue as when I received it back this time the wifi worked (yay) but now I had no signal on my phone. I tried my wifes sim in my phone which I know for sure works and still no signal. So back it goes to Sony.
Then I get it back saying the sim tray had been replaced but alas still no signal. But both times I've had no signal I've tried to connect manually to a network under the settings but noticed that the default network ticked in the list is "3 UK" with other 3 and EE networks unavailable but listed and O2 nowhere to be found. So with this information I think maybe i've been changed over to 3 somewhere down the line and thats the problem. So I've gone to a local phone repair shop and borrowed a 3 PAYG sim, not registered with it or got any credit on it and the phone at first showed no signal again but then as was in the settings with the guy in the shop noticed a couple bars of signal seemingly confirming my theory.
However after checking the sim lock using *#*#7465625#*#* it says that it isnt locked. So should still work with my sim right? Unless I'm misunderstanding how a phone is locked to a network.
Any opinions on the problem would be greatly appreciated as I'm getting rather frustrated with the whole thing.
