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STOP ! Before you say anything, please read the whole post ... My aim is not to go back to android but to help people to do it if they need to.

One week ago, for a reason not known even today, one of a SIM of my Xperia F5122 (Yes dual sim with 2.1.4.14) was not working anymore. SIM display 2G instead 3G ... And after a superficial clean on the SIM, it just asked for the code but didn't network anymore. I changed the place of the SIM Card, it was worst ... The more I made test, the less the SIM card answered :( At the end, I didn't get any SIM Card answers. I tested them on another phone (Samsung J3) and each of them didn't have any problem ... So I though about a hardware problem. I contact Sony as my phone had only 4 months. The garanty should work ... But the email answered from Sony make me a bit afraid. "The guaranty does not work if any software modification was done ..." Ok, Sailfish is official BUT on F5121 ... I don't know Sony but a lot of entreprises take any mistake to refuse guaranty. I decided to put back Initial Android ... But no where it was explained :( It is why I wanted to explain How i did that ...

[HOW-TO] Install back Android on Xperia

1.Put back the lock on Bootloader. For that use flashtool

Start it. Then, your Xperia off, hold the volume down and plug the mobile to PC. Once connected, flashtool will offer you to Lock the bootloader. Do it.

2.Install Xperia Companion

Just repair your phone by following this link

After a succes, I tested my both sims with android ! They work !!! Problem from Sailfish X !?? Impossible, I have reset to sailfish factory to be sure (factory settings, no application anymore etc ...) ... SIM Card were not working !

I want to be sure, with flashtool, I unlock the bootloader (easy as the software keep your code in memory !!)

flash-on-window.bat ... Sailfish installed again .. The both SIM card work correclty as before ...

I don't know where the problem came from but this both installation solve it. I expect my post help somebody which can have this kind of problem. Hope this help

STOP ! Before you say anything, please read the whole post ... My aim is not to go back to android but to help people to do it if they need to.

One week ago, for a reason not known even today, one of a SIM of my Xperia F5122 (Yes dual sim with 2.1.4.14) was not working anymore. SIM display 2G instead 3G ... And after a superficial clean on the SIM, it just asked for the code but the network didn't network work anymore. I changed the place of the SIM Card, it was worst ... The more I made test, the less the SIM card answered :( At the end, I didn't get any the both SIM Card answers. didn't answer. I tested them on another phone (Samsung J3) and each of them didn't have any problem ... So I though about a hardware problem. I contact Sony as my phone had only 4 months. The garanty should work ... But the email answered from Sony make me a bit afraid. "The guaranty does not work if any software modification was done ..." Ok, Sailfish is official BUT on F5121 ... I don't know Sony but a lot of entreprises take any mistake to refuse guaranty. I decided to put back Initial Android ... But no where it was explained :( It is why I wanted to explain How i did that ...

[HOW-TO] Install back Android on Xperia

1.Put back the lock on Bootloader. For that use flashtool

Start it. Then, your Xperia off, hold the volume down and plug the mobile to PC. Once connected, flashtool will offer you to Lock the bootloader. Do it.

2.Install Xperia Companion

Just repair your phone by following this link

After a succes, I tested my both sims with android ! They work !!! Problem from Sailfish X !?? Impossible, I have reset to sailfish factory to be sure (factory settings, no application anymore etc ...) ... SIM Card were not working !

I want to be sure, with flashtool, I unlock the bootloader (easy as the software keep your code in memory !!)

flash-on-window.bat ... Sailfish installed again .. The both SIM card work correclty as before ...

I don't know where the problem came from but this both installation solve it. I expect my post help somebody which can have this kind of problem. Hope this help

STOP ! Before you say anything, please read the whole post ... My aim is not to go back to android but to help people to do it if they need to.

One week ago, for a reason not known even today, one of a SIM of my Xperia F5122 (Yes dual sim with 2.1.4.14) was not working anymore. SIM display 2G instead 3G ... And after a superficial clean on the SIM, it just asked for the code but the network didn't work anymore. I changed the place of the SIM Card, it was worst ... The more I made test, the less the SIM card answered :( At the end, I didn't get the both SIM Card didn't answer. I tested them on another phone (Samsung J3) and each of them didn't have any problem ... So I though about a hardware problem. I contact Sony as my phone had only 4 months. The garanty should work ... But the email answered from Sony make me a bit afraid. "The guaranty does not work if any software modification was done ..." Ok, Sailfish is official BUT on F5121 ... I don't know Sony but a lot of entreprises take any mistake to refuse guaranty. I decided to put back Initial Android ... But no where it was explained :( It is why I wanted to explain How i did that ...

[HOW-TO] Install back Android on Xperia

1.Put back the lock on Bootloader. For that use flashtool

Start it. Then, your Xperia off, hold the volume down and plug the mobile to PC. Once connected, flashtool will offer you to Lock the bootloader. Do it.

2.Install Xperia Companion

Just repair your phone by following this link

After a succes, I tested my both sims with android ! They work !!! Problem from Sailfish X !?? Impossible, I have reset to sailfish factory to be sure (factory settings, no application anymore etc ...) ... SIM Card were not working !

I want to be sure, with flashtool, I unlock the bootloader (easy as the software keep your code in memory !!)

flash-on-window.bat ... Sailfish installed again .. The both SIM card work correclty as before ...

I don't know where the problem came from but this both installation solve it. I expect my post help somebody which can have this kind of problem. Hope this help