So now, 5 years later it's possible to transfer across networks from last month(April 2018)
Airtel seem to have blocked that option of sending to other network via the Airtel Money menu. You now have to use USSD *222*1#. It's not working for me though, anyone else tried it?
It's NO LONGER FREE to send from Airtel to other networks, I guess
I've read on the link below that now Airtel clients can now only withdraw from Airtel agents and MPESA from MPESA agents.
https://www.techweez.com...l-money-m-pesa-charges/