BT Mobile contract date end date

[Tally1001]

I have 4 mobiles on contract with BT Mobile family sim but they all show 18.10.2021 as contract end date, is that right as in thought only one was 12 month contract and all others was 1 month. I'm thinking of moving the possibly main one to vodaphone as the coverage is better at home so when we go out we have 2 providers instead of one.

thanks

[-Richie-]

If you have a family sim plan, the main plan is on a 12 month term, sims added to it are on a rolling 30 day contract.