Odido, the post-Deutsche Telekom merger of T-Mobile and Tele2 Netherlands, has launched SimWallet, an application that allows users to purchase connectivity to the Odido mobile network. This is the best example of the risk and opportunity that eSIM presents to MNOs yet, and it is going to be rather hard to put this toothpaste back in the tube once it gets out. Traditionally, the MNO has had complete control over the SIM – the Subscriber Identity Module that acts as the network gatekeeper. If a phone did not have a SIM card, it could not connect to the network. The MNO had additional controls over the SIM, in terms of what services that SIM was entitled to on the network,…