There are many services on the market offering data & SMS over multinetwork SIM Cards, however multinetwork voice is rare and often not available on an M2M SIM Card.

AES Multinetwork M2M Voice SIM Cards offer all of the usual benefits of M2M, but also include the ability to make and receive voice calls. Making this an ideal option for services such as Intercom, Lone worker alarms & any other project where voice calls will be required. In the UK the networks that are available to our SIMs are Vodafone, O2, & Meteor