I have a 20 gb plan, 4 lines shared, so for me, if I'm understanding this correctly:
Old 20 gb plan, 4 lines shared: $140/month + 4 x $15 = $200/month
New 25gb plan, 4 lines shared: $110/month +4 x $20 = $190/month
If I understand this correctly, I'll get 5 extra gbs, wont have to worry about overage fees, and I'll be saving $10/month.
I think that's right. If you don't come that close to using all 20GB right now, you can save an additional $20.