Digital Matter Support

FAQ - SIM Cards

Do I need special M2M Sim cards?

No, any SIM card will work as long as it can get a data connection on the network.


Do The SIM Cards Need To Support Voice and SMS?

The SIM card does not need to support voice calls and technically does not need to support SMS either.

We recommend that the SIM supports SMS in case you need to send a text message to the device to get it on air, but it is not required. 

Do I need a Dedicated APN?

No, the SIM cards can use a public APN, or a private APN. 


Do I need a SIM card with a static IP address?

No, the SIM card can use a dynamic IP address. 


How do I see which SIM card is being used by which device?

A SIM card is uniquely identified by its ICCID (serial number). SIM management systems (eg. Jasper) will allow you to search for a SIM using this number. There are two places that this information is shown in our systems:

OEM Server: 

Click on the 'Details' link for the device:

 


On the details page the SIM ICCID is shown:


 

Telematics Guru

You can find the SIM ICCID on the 'Advanced' tab of the Asset.
This column is also available on the "Asset List" report.

 

How much data do the devices use per month?

This question comes up often, and depends on a few factors:

  1. Device Type: the type of device affects how much data is sent and how often
  2. Device Setup: what is the device setup to do?
  3. Network: what is the minimum connection charge?
  4. Network quality: how often is the device forced to reconnect?

Rules of thumb:

  • Battery powered devices (i.e. Remora2, Oyster2) use about 1 - 3MB of data per month, dependent on settings
  • Wired devices (i.e. Dart2, G62, G100) use about 5-10MB per month:
  • Roughly 0.25MB per month for aiding data
  • About 30kB per hour in-trip, on default settings
  • About 2kB per upload in connection overhead, plus any minimum connection charge

Keep in mind:

  • The minimum connection charge has a massive effect on the data usage. Consider Vodacom in South Africa. Each new data connection is charged a minimum of 10kB. The device may send less than 1KB on a heartbeat, but it is still charged for 10kB. With hourly heartbeats, this adds up fast. 10kB per heartbeat x 24 hourly heartbeats x 30 days = 7.2MB. That's just on heartbeats. MTN in South Africa charges a minimum of 25kB per connection. That's 18MB.
  • Dropped connections also have an effect: each reconnection could be charged the minimum connection charge.
  • Grouped/pooled data plans provide some 'breathing room' for devices that may upload more than planned, since there will be others in the pool which use less data that month.



 


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