Cyclops shoots the driver's side mirror off his vehicle in the desert scene. In the next scene, when Michael drives off in Cyclops' vehicle, the mirror is intact.
After Michael asks if there's a compass on his phone, Ja replies, "No signal".
Compass apps are magnet-based, and do not rely on connectivity.
When the group meets with Omar to hitchhike a ride out of Sana'a, Dominic Purcell (Lincoln) is not actually on the set. A body double is standing in for him and his scenes were inserted into the scene electronically. The body double can clearly be seen as the group walks towards Omar and when they're beating him for setting them up.