This week I had to take my iPhone 13 to have the display replaced, and I took the opportunity to replace my microphone too.
There is no Apple support in my city, and in addition Apple support is extremely expensive in my country, so I took the cell phone to a reputable unauthorized assistance center in my city.
The service took about 2 hours, and after the service I started having problems with my eSIM subscription, and ended up deleting it by accident.
When trying to download it again using the QR Code sent by MNO, I got an error.
I thought it was because it had been a long time since the QR Code had been generated, so I asked MNO to generate a new QR Code, but it failed again.
Then I realized that the EID had changed, that's why it failed.
I passed the new EID to MNO, they generated a new QR Code, and this new one worked.
According to the rules, the EID should not be changed, that is, in order to change the EID of a device, it shpuld be necessary to change the eUICC (eSIM hardware), however, it is possible to change it via software, the eUICC manufacturer could do it (even though it's against the rules).
Given this scenario, I imagined that the assistance would have replaced the mainboard, however, checking the serial numbers on my iPhone box, they all match (Serial Number, IMEI, IMEI2), except the EID.
I analyzed my iPhone on 3uTools to check if the parts present in the cell phone had been replaced, and the only one that indicated as replaced was the display.
From what I researched, it seems to me that the eUICC is soldered to the mainboard, so I think that for the assistance center to be able to change the EID the way it was, they would have to remove the EID from the mainboard and then solder a new one, or change the entire mainboard, migrate the more than 200 GBs of data on my iPhone, and somehow managed to change the entire serial numbers records.
I don't think it's possible to do all of this in 2 hours, and I don't even know if these scenarios would be possible.
I have no idea what could have happened, as the EID was not supposed to be changed via software.
Has anyone ever had their EID changed? Or does anyone have any idea what could have happened?
There is no Apple support in my city, and in addition Apple support is extremely expensive in my country, so I took the cell phone to a reputable unauthorized assistance center in my city.
The service took about 2 hours, and after the service I started having problems with my eSIM subscription, and ended up deleting it by accident.
When trying to download it again using the QR Code sent by MNO, I got an error.
I thought it was because it had been a long time since the QR Code had been generated, so I asked MNO to generate a new QR Code, but it failed again.
Then I realized that the EID had changed, that's why it failed.
I passed the new EID to MNO, they generated a new QR Code, and this new one worked.
According to the rules, the EID should not be changed, that is, in order to change the EID of a device, it shpuld be necessary to change the eUICC (eSIM hardware), however, it is possible to change it via software, the eUICC manufacturer could do it (even though it's against the rules).
Given this scenario, I imagined that the assistance would have replaced the mainboard, however, checking the serial numbers on my iPhone box, they all match (Serial Number, IMEI, IMEI2), except the EID.
I analyzed my iPhone on 3uTools to check if the parts present in the cell phone had been replaced, and the only one that indicated as replaced was the display.
From what I researched, it seems to me that the eUICC is soldered to the mainboard, so I think that for the assistance center to be able to change the EID the way it was, they would have to remove the EID from the mainboard and then solder a new one, or change the entire mainboard, migrate the more than 200 GBs of data on my iPhone, and somehow managed to change the entire serial numbers records.
I don't think it's possible to do all of this in 2 hours, and I don't even know if these scenarios would be possible.
I have no idea what could have happened, as the EID was not supposed to be changed via software.
Has anyone ever had their EID changed? Or does anyone have any idea what could have happened?