Default Mt6582 and mt6592 imei repair in metamode

Hi, i really need help. Since mt6582 and mt6592 came out, i wasn't anymore able to repair IMEI in meta mode.
If i use sn write tool 1.5.3 the smartphone seems to enter metamode but software won't detect it.
Is there any suggestion about it? i would like to make a donation if you can help me solve this problem