Hey there @andru13 ,
EMO completely freeze is something that normally happens very rarely. Letting him run out of battery normally is a good idea and resolves the issue sometimes. But as you mention already that it was already performed but it didn’t actually help.
How to Power Off your EMO
else…you can try Force Shut Down
… I guess try this method
It’s not a reset button but a force shut down button inside his head (insert a tiny paper clip and gently press.
It will power off EMO, but it is not always recommended and should only be done if there are no other options as it could lead to possible data corruption.
About the App connection issue:
Power Off EMO. Leave EMO turned off.
Power off your Phone. / Then power it back up. Wait for it to be back on
Check to see if your phone has access to WIFI/Internet and also ensure that your Bluetooth is on and working.
If everything is okay…
Then power your EMO back on. Once EMO is back on try connecting once again using the EMO App.
Also, you can try using other phones with another operating system.
Hope any of my suggestions help you to resolve the issue.
GOODLUCK!