Sometimes the phone has no signal at the customer's door. Your driver still completes the delivery the usual way.
Step 1. Take the photo as usual
He opens the delivery, presses Delivered, then Take photo.
Step 2. Complete the delivery
He adds a note if needed and presses Complete delivery. On a cash order he presses I collected with the amount and confirms.
If he sees Photo waiting to upload, he keeps this screen open and moves to where he has a signal.
Step 3. Wait for the signal
Until the photo is sent, the delivery still reads On the way.