I am considering upgrading my iphone texting plan. Currently I have used 188 of 200 messages, yet still have 10 days left in the month. I remember doing this with my calling plan when I was with verizon, and I paid through the nose . . . they said because I changed 1/2 way through the month, I was only allowed 1/2 of my original (lower) minutes, plus 1/2 of my new plan (higher minutes). Therefore, I was actually penalized for switching plans when I did! Will AT&T pull this BS? Similar question on ipad: If I get the 250MB plan, but after several days it is clear I need the 2GB plan, will they prorate that like I explained above? Also, will they charge me $25 mid month for the 2GB or will they charge me $10 for upgrading from the $15 250MB to the $25 2GB. Thanks!