Hey guys, good day. I am flying the Tello drone in India and I am reaching my maximum altitude as 15m even when I have set the maximum altitude to 30m. Is this a new app update from Ryze Tech?  What is the maximum height for you pilots in your region? Are you also facing the same issue?

Dear customer,
Official Tello APP doesn't have the function of showing flight height limit of your region. 30 meters is the biggest flight altitude of Tello and it was tested in an ideal flight environment. In reality, the drone's performance will be influenced by many factors, such as electromagnetic interference, including WIFI hotspots, routers, Bluetooth devices, high voltage lines, high voltage power transmission stations, mobile base stations, or broadcasting towers, etc.  
Hope my response could help you!

Dear customer,
Official Tello APP doesn't have the function of showing flight height limit of your region. 30 meters is the biggest flight altitude of Tello and it was tested in an ideal flight environment. In reality, the drone's performance will be influenced by many factors, such as electromagnetic interference, including WIFI hotspots, routers, Bluetooth devices, high voltage lines, high voltage power transmission stations, mobile base stations, or broadcasting towers, etc.  
Hope my response could help you!

Maximum is 50 metres for any nano drone.. you can fly without licence or registration in an enclosed environment.. nano drone weight less then 250 gm and limit of 50 metres is fine.