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PLS8-E won't connect to 4G/LTE | Thales IoT Developer Community

November 30, 2017 - 12:26pm, 2309 views

I trying to get a PLS8-E modem to connect using 4G/LTE, but it will only do 3G. I'm hoping to find the appropriate setting to change to persuade it to use 4G/LTE.

I'm using a SIM that I have put in a phone and achieved a good 4G connection.

I believe I have a good enough 4G signal, and I also thought that if the signal was good enough, it should automatically connect at 4G.

After making a successful 3G connection, AT+COPS? gives this response:

COPS: 0,0,"O2 - UK",2

I presume the RAT of 2 (UTRAN) implies that it hasn't seen a good enough signal to use E-UTRAN?

I've effectively disabled 3G by changing the value of Radio/Band with AT^SCFG to include only the 4G/LTE frequencies. This certainly prevents a 3G connection, but doesn't help to get a 4G connection.

Does anyone have any suggestions? Are there any other commands I can use to diagnose the reason?