We live in US but travel 2 or 3X a year to UK and EU. We have a 3UK mobile account and pay-as-you-go for each trip. We've registered our account to keep the number. But we only top-up when we travel. Lately we received a notice that our service would expire if we did not add a top-up. So we did but the plan expires in a few days as it was only good for a month. Will we lose our number if we let the plan expire? Thanks.
