hi, i have RM-551E-GL, on sumcomm 08 ultra. It is very convenient i can use GUI to do many things without entering any AT command manually. But i have a problem:
when i cell lock, 1850, 100 and 300, 100. It sometimes during network congestion only connects to one band B1 and then stays like this even when i enter AT command manually: AT+QNWPREFCFG=“lte_band”,1:3:20:41
Only solution is to disable cell lock then it CA normally to B1, B3, B20.
The reason i cell lock is that sometimes, rather strangely, the router connects to B41, CA5 mode, i mean it connects to B41,B41,B41,B41,B41 and loses all internet, with this band connected, there is no internet!!!
Now i have disabled cell lock and have unticked band 41 and 38, so that it does not connect to it.
i am new in these things, so may i am missing a simple trick or my ISP is culprit, i am not sure.