What is the difference between GSM and GSM_compact as used in AT+CPOL

IoT Modules LTE Standard Module
1

I am starting to use CPOL to exclude certain providers, and wonder how I might for example exclude 2G. It is not clear however how GSM and GSM_compact correspond.

Thanks!

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Oh, you are great, the focus is very deep.
GSM_compact is simply a radio channel improvement technology that enhances voice and data transmission quality, so we don’t need to pay attention

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