If you have purchased the device, it is your property. A return is no longer possible after the statutory revocation period of 14 days (only if the purchase contract was concluded online or by telephone). 

As far as I know, the o2 Homespot 5G from Askey was exclusively sold and not rented out. Therefore, the device does not need to and cannot be sent back to o2. 

Hello @SelimBY,

thank you for your inquiry in our o2 community

The homespot is currently being purchased by you via an installment plan. Once the last two installments have been paid, the router belongs to you.

A return is only necessary for rented devices, which is not the case here.

Please let us know if you have any further questions.

Best regards

Giulia