I have an LG G3 currently and still owe $239 on my tab, but I am pretty bored of it and have noticed that the iPhone 6 is $0 right now with a "tab plus"
Do I have to pay off the $239 to get the iPhone 6 or can they just add my $239 to the new tab I would have to start for it??
As long as the account is in good standing, you can have the remaining tab of the LG G3 billed on to your next bill. Unfortunately, you will not be able to add the remaining tab to your new one. The system will automatically bill you for the tab. Also, tab plus is subject to your credit.
Here is a cost breakdown for you. The cost will be quite high, I would recommend you sell your G3 on kijiji to try to makeup the remainning tab balance. As everyone else said though, your plan will cost you a lot more every month if you do decide to get a Tab Plus.