So I've had my OnePlus 3 since this morning, about 12 hours. I just noticed that I actually had no cellular data active. I played around with the APNs a bit, using nextgen doesn't work at all, but using "phone" gets me HSPA (I don't see a "+"). This is using the sim I pulled from my iPhone 6 and put in sim slot 1 and called AT&T this morning to get it working (initially I had no voice or data, with the AT&T rep on the phone I confirmed I could make calls, but apparently data never worked). I confirmed all APN settings on AT&T's site, also tried IPv4/6, tried the old Cingular connection urls, tried creating my own APN, HSPA was the best I could get. I pulled the sim and put it in slot 2 figuring this imei related, but in slot 2 I could only connect at Edge using the "phone" APN.
I saw a reference to their being two plans available in AT&Ts system for unlocked devices - 4g and LTE. Supposedly the 4G plan will only give HSPA. I'm thinking that may be what the rep did this morning - associated my sim with that plan. However with the imei entries for the 1+3 supposedly not being in AT&Ts database yet I'm not sure I'm going to get reliable LTE on this. Very disappointing! Guess I'm off to the AT&T store tomorrow to see if we can get this straight.
I saw a reference to their being two plans available in AT&Ts system for unlocked devices - 4g and LTE. Supposedly the 4G plan will only give HSPA. I'm thinking that may be what the rep did this morning - associated my sim with that plan. However with the imei entries for the 1+3 supposedly not being in AT&Ts database yet I'm not sure I'm going to get reliable LTE on this. Very disappointing! Guess I'm off to the AT&T store tomorrow to see if we can get this straight.