Stuck on 4 digits when adding the device

[Moniis]

Hi I've purchased an ionoc of eBay and I can't seem to get pass the 4 digit code. My phone connect to ionoc via Bluetooth, everything seems fine but as soon as I put the 4 digit number in it goes back to the menu.

I've tried:

- resetting my phone 

- forgetting the device on Bluetooth, deleting all my other devices on Bluetooth 

- deleting the fitbit app

- factory resetting ionoc

It just doesn't seem to sync and any help would be appreciated 

[SteveH]

Have you checked that your phone is supported by fitbit at www.fitbit.com/devices ?

[Moniis]

I had charge 2 and it connected without any problems