Here's a major issue that PPL have difficulty comprehending: When you change plans in middle of cycle, you pay in full and such. What PM should do, is if you bought 4 Gigs, run out, and wish to buy more, allowing PPL to do so w/o necessarily changing the billing cycle, or let's say upgrading from Province-wide to Canada-Wide, just Paying the difference, but capping it where if you change before the half-way point of the 30 day, you pay the difference and retain your billing date.