xperia z3 no mobile network after lollipop update

[roman2]

and the worst thing that sony refused in warranty repair because they couldn't find some special label with IMEI number inside the phone.. I have no idea how this label look like... but IMEI can be easily seen inside phone info menu!!!.. 
this is all very disappointing..

hope someone from sony here can solve my problem.. your call-center in russia is awful.. they just don't respond on my request which I submitted more than 3 weeks ago

always before buying sony phone check if it has that mystery label.. or no warranty..

[Bau8]

I have a problem with the network it works great in 3G but not no 4G at all I already download lollipop I thought lollipop would fix the problem but it's doing the same thing no 4G at all