AT&T Prepaid in MC7455 - won't attach

[RuralWandering]

Hey all. So I was using sprint before -constantly roaming, it would only work on band B5, and they told me that was an at&t band they had a roaming agreement with.

I got an AT&T prepaid sim and when I put it in my phone it showed no bars. However, my router shows signal on band B5 and B12. After a long while of wandering my yard I finally got it to show LTE and it received a text saying I'd paid my AT&T prepaid bill. So I assumed the sim is active.

I placed the sim back in my router, and I still pick up B12 and B5, but I cannot get it to attach. Here is the output

at!gstatus?
!GSTATUS:
Current Time: 830 Temperature: 26
Reset Counter: 1 Mode: ONLINE
System mode: LTE PS state: Not attached
LTE band: B5 LTE bw: 5 MHz
LTE Rx chan: 2425 LTE Tx chan: 4294967295
LTE CA state: NOT ASSIGNED
EMM state: Deregistered Attach Needed
RRC state: RRC Idle
IMS reg state: No Srv

PCC RxM RSSI: -65 RSRP (dBm): -91
PCC RxD RSSI: -69 RSRP (dBm): -97
Tx Power: 0 TAC: 1206 (4614)
RSRQ (dB): -11.8 Cell ID: 07D17902 (131168514)
SINR (dB): 26.2


OK



What can I do to resolve this?

[RuralWandering]

Edit: I took the sim and phone down the road and it finished activating the sim card. It made calls and used dafa fine

Back at home the router is reporting Excellent to Good signal with Bands B5, and B12. It also picks up B13 but I haven't tested the strength yet

Despite the great signal reads it still says "attach needed" -

Please someone help me figure this out. I have no other internet here and I am desperate.

[Didneywhorl]

The SIM isnt getting access to the network.

RRC State: RRC Idle
LTE PS State: Not attached

Both possible indicators for account/SIM issues.

[Dr-BroadBand]

Hay RuralWandering

Why are you trying to use Pre-pay?

You would have better luck with post pay

[JoseDeSantiago]

Have you changed your Custom TTL settings to 65?

Also have you sent any band lock AT commands to your modem, they might cause an issue?

I performed a reset on mine and changed it to MBIM Mode and it works like a charm, on both Cricket and AT&T