After flashing global rom wrong, my phone got bricked then i reflashed again the rom using mi flash tool and it was successful. Only to find out that the IMEI is lost and so i can't call and text and use mobile data. I found some tutorials in miui forum about restoring imei and i was stuck in going to diag mode. I have rooted my R4P and followed the instructions but it just cant go to diag mode. Please help me guys if you know how to got to diag mode so that i can fix my phone. Thanks.