Suggestion: Electroneum does not need to partner with mobile networks to sell airtime. They can simply register as a reseller and then sell vouchers for all the local providers in the electroneum app. Resellers get the airtime vastly cheaper and so electroneum can actually generate a profit by selling airtime inapp or they can make etn purchased airtime cheaper than other providers and therefore more attractive to electroneum users.
If so was electroneum I would forget partnering with all the stuck up networks and simply register as resellers and add all the local networks in app. This way instead of forcing electroneum users to get a new simcard from a relatively new player they could add existing networks.
This will already make in-app purchases more popular.
I understand electroneum is giving networks the change to join the party but that might me not the best idea. Bypass the networks and sell their airtime and make a profit doing it