Lost imei on my galasy s3 i9300i

[hesham_a22]

I updated my device to 4.3 the return to 4.1.2 i lost mu imei and no network on my device , i want update my device to 4.3 and i want to solve the problem of losing my imei ( my device not rooted)

 

[aspot72]

I updated my device to 4.3 the return to 4.1.2 i lost mu imei and no network on my device , i want update my device to 4.3 and i want to solve the problem of losing my imei ( my device not rooted)

Can you explain how did you did the update to 4.3?