I'm on the iUP with a 7+. My husband's 6 is literally at death's door so we're considering paying my iUP off early so he can have that, and i'll start from scratch again with an X. I wonder whether it's a stupidly risky strategy to order on Friday as an upgrade (using the streamlined link in the app), and then on collection ask to start again instead of upgrading, and settling the outstanding amount with Barclays in the meantime.