This could be for a number of reasons:
- Incorrect device APN configuration, see more information here
- Network is down, see more information here
- Device reached the cut-off point for the network
If the issue persists or for further clarification please contact Singtel GSD (Global M2M Connect Service Desk) through its 24 hours service hotline
- 24×7 service helpdesk: 1800-788 0022 (Press 1 for M2M)
- E-mail: gcsc@singtel.com