M2M SIM Card
How do M2M SIM cards work?
Small bundles for small businesses
Data Bundle Aggregation
If you have more than one M2M SIM card then the data bundles for each M2M SIM will be added together and can be used as a pool of data for them all to use. That means that any over use by one M2M SIM can be offset by under use on another, and so avoid any overage charges.
For example – A single 5Mb M2M SIM using 6Mb in the 30 days would normally face overage charges for 1Mb. Three 5Mb M2M SIMs would give a pool of 15Mb data to use over 30 days. If one of them used 6Mb, but the others only used 3Mb each, the total usage would be 12Mb and so below the aggregated 15Mb data bundle – so no overage charges would be due.