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Please read this if you considering unlocking the boot loader or rooting your phone.
Please note that you may void the warranty of your phone and/or any warranty from your operator if you unlock the boot loader. You should only unlock the boot loader of your phone if you are an advanced user with good knowledge of the technology and risks involved.
For more information go here http://unlockbootloader.sonymobile.com/
Please also note
The Sony Xperia support team will not be able provide any support, related to unlocking the boot loader or rooting your phone.
We also recommend you to read the below blogposts.
Sony Xperia support team
2017-01-16 02:25 PM - edited 2017-01-16 02:26 PM
Dear, I also invited the same problem with my M2 Dual (D2302). Approached Sony Service Centre and on there advice changed the Mother Board. I Know Costly the Repair. But since i like that phone very much i have to go for it. Other internet ideas and solutions never work with this Sony Xperia. So, if you want to get your mobile back in to working condition then approach Sony Service Centre Please.
I need to make phone calls
2018-06-23 03:05 PM
There is no options like what you said in my Xperia z5 premium with the last version if android the only option is radio band USA,
Please help me fix it if you know how