Rsim 10 + digicel jamaica & flow jamaica no incoming calls


Hello

I have purchase 30 rsim 10+ thinking these would enhance my business to unlock iphones that can’t be unlock by apple factory unlock. I have tried it with Iphone 5s locked to BELL canada and i got signal but no incoming calls.

I have also tried it with T-MOBILE usa and i got signal but no incoming calls. Is there any fix for this? My customers are unhappy with this half service. THis is truly foolishness. I need answer from you guys asap. HOW CAN I FIX THE INCOMING CALLS AND INCOMING TEXT when unlock with RSIM 10+?