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Dear friends , I have sony xperia zl C6506 that lost then updated the baseband imei and service

and it flashes on Several Occasions tool flash, Sony PC Companion and  Continues to exist Problem, By s1tool flashes via the Tespoint , But Continued Problem

Also note That when i put up to version 4.2 did not load Full System is renicia , But if it's 4.1 or 4.2 Turn on Fully

Annex  some images

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Are you sure that it is C6506 phone model? Please check that on the sticker under back cover... If you will flash wrong firmware for example C6506 firmware to C6502 phone you will get no imei / no baseband result... And flash correct firmware.

 2015-03-30 13.46.27.jpg   125.8K   0 downloads

Great... Now download C6506 firmware and flash your phone. If after that you will see no imei / no baseband problem - it must be hardware then. Check modem ic... however there is no electrical schematics available so you must inspect main board and find it by yourself.