My Inspire 1 has been activated for years now. I got a new TB47 battery and now I am getting an activation request that requires a mainland china phone number?
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Hi Mowog, sorry for the trouble caused, please try the following steps to see if the issue persists:
1. Clear all cache in Settings.
2. Bring the aircraft to the place with strong GPS signal.
3. Connect your mobile device to local network and reboot the APP.
4. Reconnect aircraft to APP.
Merry Christmas.

DJI Mindy Posted at 2017-12-25 00:10
Hi Mowog, sorry for the trouble caused, please try the following steps to see if the issue persists:
1. Clear all cache in Settings.
2. Bring the aircraft to the place with strong GPS signal.

Why all these steps for a new battery?

Lucas775 Posted at 2017-12-25 19:31
Why all these steps for a new battery?

I don't think so, the issue happens occasionally.
From the posts before, this message occurs after using Simulator.