Hi there
I’d be happy to help with your upgrades and plan changes! What I would recommend would be to first upgrade the devices, staying on their current plans. When you receive the new phones, you can then make the plan changes. When changing your plan online, you would be asked which lines you wish to include in the new Mobile Share Value plan. As long as you do not include the iPhone line, you would keep your unlimited data.
If you would like us to assist with this, please contact us.
If this helps, please mark this answer as an accepted solution!
Thanks,
Charise