Well half the time there's no Internet at all. Then the rest of the time it's mostly high latency and Internet at ~5kbps. Perhaps once a week we get a few hours of 3G, hitting speeds of 200kbps tops.

Have you heard of AirJaldi? - they're a not for profit that have been setting up long haul 802.11 links throughout the Indian Himalayas.

Not sure if they've reached Leh though.

No I hadn't. I just checked and the nearest network is Manali, so they're on their way :) [1]. I'd heard about such networks before, but wasn't aware they were so actuvely and successfully implemented, very inspiring. 1. https://airjaldi.com/networks/manali-network/