[Q] Sim card reading issue - Rooted UnRooted IMIE change topic

I have unlocked my i717 phone, sim card read fine on Family Mobile service powered by T-Mobile. Then rooted phone using Odin. removed apps I didnt like. after removing Kies air and a few other AT&T apps. I got the alert at the top area no sim | emergency calls only I turned phone off then back on same issue. I return phone to factory setting another issue also didnt use odin to unroot. however I did download full ICS file and used odin to unroot then wiped clean to factory setting. The issues with sim card not reading still remains. I do have another i717 and check with hardware change of sim card reader as well as checked sim card its self in another phone and it works fine.

check with local phone tech guy he said I might have an issue with IMEI change when doing the first root? he also told me to come here for help.

How can I check if this has happened?

How can I change it back?

How can I change it to work with my Family Mobile service powered by T-Mobile?


Thanks