Motorola XT1526 No Service plz Help

hi i m receive 1 motorola xt1526 in no service it is show’s sim application but signal not show. baseband ok android version 5.1 MEID and IMEI show ok ICCID show but MIN unknown and PRL Version unknown. plz help me this is 100% software fault. 5 days ago another customer come with same model same fault. but i flash hard reset but nothing then i return that set. customer goes to another software shop and in 10 minutes set is ok with full signal without flash without reset.