To complete the ideas from the Telegram-thread a few days ago I add my draft as well. Although I was already reminded that there used to be a browser "in the old times" using a similar logo.
Teleports - port - steering wheel was the idea behind it...
In Germany there is a phrase "ein sicherer Hafen" (a safe port). A port suggests safety (for ships).
If that makes sense in other languages a marketing phrase for TELEports (independent of the icon) could be:
<marketing> "TELEports - a safe port for your chats" </marketing>
Edit 2: For legal purposes, the plane is taken from https://commons.wikimedia.org/wiki/Category:Telegram_Messenger#/media/File:Telegram_logo.svg and comes as public domain. No copyright fraud intended.