my contractends on the 17th april...all through the last few months whenever i pay my bill i always notice that on the right hand side of my o2 it has always said that i can upgrade 1 month early and the date i can upgrade is the 17th march(which will be this sunday)...i even checked a couple of days ago to make sure i could go up to the shop on sunday to pick up a new phone..i have just logged on to check my data usage and the upgrade has changed to the 18th march...i know its only a day but has anybody had any experience of this before and could shed any light on the reason why???
