Clearing preferred, Roaming, forbidden list


Does anybody know the magic spell to clear those lists? In my tiny, very location dynamic, IOT application I’ve got not a far from ideal antenna situation, so what was a preferred PLMN an hour ago can be a bad choice now, resulting in a far longer network registration time then if it would use it “blanco” registration mechanism (hopefully looking at signal strength of all available)
As the the battery of my application is very limited, I would like the registration time as short as possible.

So how can I clear those lists?

If a PLMN is inserted into the forbidden PLMN list the only way to remove that PLMN is via manual network selection and successful registration on that PLMN.
Please refer AT+COPS command for more details…