Hello@Derrybongo ,
Please confirm Tapo app and tapo device firmware are both upto date first.
(How to share your Tapo smart devices (smart plug, smart camera, smart lighting) with your families ? )https://www.tp-link.com/support/faq/2613/
May I know do you use the admin account * the main account to share the tapo device?
To use camera in a different phone, you could also log in to same admin account on Tapo APP to manage the device.
Please check plug sticker and check what is hardware version and country version (EU.UK, US etc.) of Tapo P100? Thank you