iPhone 6 activation problem after reprograming HDD
 

Hello everyone

i received and IPhone 6 that stuck of DFU mode with error 40 so i checked the Nand Flash and it was replaced before i reballed the same one and managed to restore the iphone with no errors but when i try to activate it i get error that says: the activation information could not be obtained from the device

then i checked the IMEI in in the Phone it was different than the IMEI on the back casing then i checked the IMEI online it appears as IPhone 6 Plus white? while the iPhone i'm working on is a 6 black so i thought maybe the person who ever tried to replace the nand ic they didn't reprogram the ic so what i did i searched the imei on the back case online and found the serial number i put the ic in programer i changed the serial number and the color to black and model to iphone 6 installed the nand on the board restore it but again same error and the funny thing the serial number changed but the imei still the same old imei for the iphone 6 plus so please any one knows what's going on?

i think the person who worked on this phone replaced the baseband cpu too thats why the imei is diffrent? and in this case there is no solution?

i checked online it says the phone was refurbished by apple, and i just checked the cpu was reballed, it seems someone replaced Hdd, CPU,BB CPU...etc to remove the icloud? but they used parts from 6 plus? maybe it was working before ios 11 even if you transfer icloud ic's from 6 plus to 6 but on ios 11 it doesn't work anymore

Check this solution: