We’re currently preparing a couple of our WP7702-based products for PTCRB certification (in order to get AT&T certification) and the lab has told me that the device should only operate on bands 2, 4 and 12.
The problem I’m having is that when I try and set the bands using the AT*PSRDBS=1,269745176 (which is the three bands combined), I get an ERROR response. In fact, any band results in an ERROR.
The manual suggests that my RAT settings could have an impact on this, so I changed it from 12 (GSM and LTE) to 06 (LTE ONLY) and finally 00 (Auto) with the same ERROR results.
I have tried the PTCRB and Generic (Sierra wireless) versions of firmware to no avail.
Does anyone know how to limit the device to bands 2, 4 and 12 successfully?
Thanks in advance!