I want to know if I am able to change my plan for an Iphone4 medium tab from the 40$ a month to the 45$ a month (+5$ for the tab) online. The differences between the plan being the unlimited calling and the 1GB of data vs 200 mins daytime and unlimited weeknights +weekend and 200 MB
Of course! Just log into Self Serve and change your plan. You will receive prorated rates if you change your plan in the middle of your billing cycle however. So be aware that your next bill may be less or more expensive than it usually should be.