Fix Android video call app (Linphone Based)

Hi guys,

I have a video calling app that runs on LINPHONE CLIENT.

play.google.com/store/apps/details?id=com.schonell&gl=SG

The only function of the app is to receive video calls.
Its mostly working for most users.

it has several bugs that need fixing such as:

- app calls unstable / unreliable (crashing, no call window to accept call at times)
- not working well with certain devices (ringing and no call page)
- different android devices requires different settings for it to work (many configs required on different model phones)

Applicants will need to have experience in linphone development libraries in order to complete this assignment.