I'm using Mini 2. It's getting disconnected after going 20m to 30m. What should I do?

Hi. Sorry about the trouble. Does this issue still occur even when flying in a different location? The smartphone clamp of the remote controller houses the antennas. Make sure that the antennas are pointed toward the aircraft. Check the User Manual for more information about setting the antenna direction.
Additionally, 2.4/5.8 GHz wireless devices can cause interference to the signal. Please avoid high-density Wi-Fi signal sources, and consider turning off the Bluetooth on your mobile devices and idle Bluetooth devices. Please keep us posted. Have a great day.