help for Sony Xperia C5 Ultra E5553/E5503 single SIM prototype TA file - Xperia C5 Ultra | C5 Ultra Dual - Sony.yt

PuXiongfei 18 Aug 2016

I got a prototype Sony Xperia C5 Ultra,the phone is single SIM ,but the phone look's like has been flash dual SIM firmware with simlock.ta.

Insert SIM card it shows SIM LOCK PIN,and the *#*#7378423#*#* -->Service info-->Configuration shows Bootloader unlock allowed:Unknow..

so,I think if i recovery prototype model simlock.ta,the phone will work normally..

sorry for my bad english..

the ta file can dump using flashtool in pro mode..

flashtool_1.jpg 39.17K 0 downloads

flashtool_2.jpg 43.58K 1 downloads

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Jurij 18 Aug 2016

Flash most earlier C5 ultra single sim firmware. If that will not help - your phone needs to be customized in Sony factory, because Sony Service Centres does not support prototype phones. Ergo - your phone can't be fixed at all.

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PuXiongfei 18 Aug 2016

Flash most earlier C5 ultra single sim firmware. If that will not help - your phone needs to be customized in Sony factory, because Sony Service Centres does not support prototype phones. Ergo - your phone can't be fixed at all.

thank you for your reply,Jurij.

I have tried flash firmware and simlock.ta file But it didn't help..

so I think I can find a prototype C5 single SIM TA FILE,use the "000007DA" area to flash my phone,it will repair SIM LOCK issue..

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Jurij 21 Aug 2016

No. You can't flash trim area from other phone - it will kill your phone forever. If you've damaged somehow security units, only Sony factory can fix your phone. And it will not be possible using third party tools, because 2048-bit rsa security is still unbreakable ;(

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