At TalkTalk the term is decisive: the portfolio mixes 12 month plans with monthly cancellable Flex variants. The Flex plans cost a little more but let you leave at any time. Check first which variant appears on your bill.
TalkTalk is distributed through Mobilezone. Cancellation runs through TalkTalk customer service or your customer account, usually in writing.
Price change at this provider: our report →Number portability is free in Switzerland and usually takes 1 to 3 working days. Important: do not cancel yourself if you want to keep your number. Register the port with the new provider, who handles the cancellation. Anyone who cancels first loses the number.
These providers run on the same network but cost less. Coverage and 5G are identical, and the order follows price alone.