Tablet means you're running on android right?
Then, it's binded with your google play account.
Try logging in with same google play account on your new device first before deleting the data on tablet.
I'm currently playing on 2 devices and got no problem.
1 problem is only about the push notification is strange.
Check ZERØ https://moot.us/lounges/276/boards/1394/posts/3108185/zer-recruiting-semi-competitive-player
Most of our members are already at level 60 and we use discord to communicate.