We have a US number already but do not use it when home, as current Sim will allow a "sleep" mode. Do you have a similar feature that will allow us to only pay for 4 or 5 months, then retain number till next fall usage?
I had asked that question earlier and this is the response I got for pausing service,
Yes, and no... Due to some privacy and security policies, we can't retain inactive account information for more than 61 days, if you suspend your service for more than that, the account will be permanently terminated and the number on it, disconnected and probably recycled. This as per our compliance with the California Consumer Privacy Act.
I think that having an idle SIM that you are paying for will not be an issue.