Yes, if you set up the eSIM before you fly. The MegaEsim Uganda plan connects to the Airtel network, so when your plane touches down at Entebbe International Airport your phone picks up signal right away. You walk out, order a ride or message your driver, and you are online. No queue at a kiosk and no paperwork.
The trick is to install the eSIM at home while you still have wifi, then leave it switched off until you arrive. When you land, you turn the data line on and you are connected in seconds. We cover the exact steps further down.