mobile

I buy phone by second hand in 6 months period I have weak reception just working on and when I swap my provider because they offer LTE when I do it my phone is useless, no reception at all on any network now. I downgrade stock rom to I9505XXUGNG2 (4 files) I was so surprise when get sms text just cant replay:/

I my previous rom in "network operators" i can found just one operator (my one three.ie) on LTE/WCDMA/GSM (auto connect) just I cant registered on it.

On the new ...GNG2 I saw all operator one times and just once get text:(

Thanks for any suggestions!