I asked Oneplus which pen works and oneplus sent me this email: Hello,

Thank you for contacting OnePlus customer service.

Unfortunately, our OnePlus Stylo is not compatible with OnePlus Open. The mobile should be operated with your finger.

Yours sincerely,
Klaudia
OnePlus customer service

sorry I find it funny because this is a big mobile it's like a tablet

Question

I asked Oneplus which pen works and oneplus sent me this email: Hello,

Thank you for contacting OnePlus customer service.

Unfortunately, our OnePlus Stylo is not compatible with OnePlus Open. The mobile should be operated with your finger.

Yours sincerely,
Klaudia
OnePlus customer service

sorry I find it funny because this is a big mobile it's like a tablet

Answer

Hm, that's a real shame to hear that the OnePlus Stylo is unfortunately not compatible with OnePlus Open 😞.

Your data. Your choice.