Ok so ive read alot from the pro devs and people on the forums that unlocking your bootloader most "likely" wont void your warrenty esp. if you just relock it by restoring your TA backup and your carefull and clean about it but i have two problems with believing this. They are as fellows.
- cant the sony apps just check for root and send a message
- the service app knows if its unlocked and since youve entered your imei number to get your key again coulddnt sony send a message with your imei number
- isnt the accounts linked between sony and google shared in the least which means the above questions can be passed on with google to sony
- according to sony even if it doesnt void the warrenty that you agree to pay an additional repair fee for modified software.