I am aware there are other threads on this issue with no fix, but this needs to be discussed and addressed by DJI.
I am unable to activate my brand new Osmo Pocket on my iPhone X, an iPhone 7 and an iPad. I am getting the same error and I am stuck with a useless device until it is activated. What am I left to do considering there are no stores locally with it in stock and I am not interested in the slow RMA process which some users are claiming they are told it could take weeks.

EDIT: I've also reinstalled the Mimo app multiple times to no avail.
DJI?

SERIAL NUMBER: 0W7DF8H0221075

Hi Makerbound, we're sorry for the troubles. Please kindly restart the Osmo Pocket and its app, then try to activate it again, making sure they have a good internet connection.
If the activation still fails, we're sorry that you may consider sending the unit in for diagnosis:https://www.dji.com/support Please kindly offer us the case number once you got it, we'd like to follow up.