When biking to Leh it is advisable to travel at a slow pace to allow acclimatization. A suggested itinerary is: Day 1 Manali - Jispa (138 km; 86 mi), Day 2 Jispa - Pang (161 km; 100 mi), and Day 3 Pang -Leh (174 km; 108 mi).
Screen repairs cost $109 for an iPhone 6 and $129 for the iPhone 6 Plus. If the Apple store near you has the parts, it will repair your phone. If it doesn't, it may replace it. There is a slim chance it may be sent out for repair. AT&T will not be involved in the repair nor will it be notified.
Depending on the type of iPhone that you have and repair service you use, the costs of iPhone broken screen repair are going to vary anywhere from $50 to as much as $270 to have the glass repaired. Generally, the older the model is, the less it is going to cost.