I have a samsung galaxy ace 2 x and i would like to know if i can change to a iohone 4s and keeping the same plan i pay 30$ every month so is it possible to keep the same plan if i switch to a iphone ?
Yes it is. If you want to get the iPhone on the tab then you can keepyyour plan as long as you take the iPhone on the Medium Tab, small tab, or no tab. If you want to get the iPhone on a large tab then you would need to change your plan to a tab large plan though.
To upgrade to a new phone on the tab you will need to pay offyyour present tab in full at time of upgrade to be able to start a new tab .