The 4G /5G Xtream has two SIM card slots which can be manually switched between, or you can use the automatic SIM switch feature to automatically switch between them. When the automatic SIM switching feature is enabled, the 4G/5G Xtream will monitor the current SIM network and if a certain condition occurs, it will switch to using the other SIM network as detailed below.
The SIM Switch section provides you with the possibility to configure SIM switching rules, i.e., set up circumstances under which the device will perform a switch from using one SIM card to another. Refer to the figure and table below for information.
| Field | Value | Description |
| Enable automatic switching | off | on; default: off | Turns automatic SIM switching on or off. |
| Check interval | integer [3..3600]; default: 10 | The frequency (in seconds) at which the device will check for SIM switch conditions. If such a condition exists, the router will perform a SIM switch, if not – it will check for the same conditions again after the amount of time specified in this field passes. |
| Attempts before SIM switch | integer [1..10]; default: 3 | How many times a condition will be checked before executing a SIM switch. For example, if the device is a state that meets at least one SIM switch condition, the device will perform a number of additional checks specified in this field and will perform a SIM switch only if the condition is met on every check. |
| On weak signal | off | on; default: off | Performs a SIM switch when the signal strength drops below a certain threshold. |
| On data limit | off | on; default: off | Performs a SIM switch when the mobile data limit for this SIM card is reached. You can set up a mobile data limit in the Network → WAN (Basic WebUI mode) or Network → Interfaces (Advanced WebUI mode) pages by clicking ‘Edit’ next to the interface you wish limit the data for. |
| On SMS limit | off | on; default: off | Performs a SIM switch when the SMS limit for this SIM card is reached. You can set up SMS limit in the Network → Mobile → General page. |
| On roaming | off | on; default: off | Performs a SIM switch when roaming conditions are detected. |
| No network | off | on; default: off | Performs a SIM switch when a network connection is not available. |
| On network denied | off | on; default: off | Performs a SIM switch when access to a network is denied by an operator. |
| On data connection fail | off | on; default: off | Performs a SIM switch when mobile data connection fails. Possible failure determination methods are:
• • LCP echo • • ICMP echo
If no echo is received, the data connection is considered to be down. |
When configuring SIM switching from the Secondary card, an additional field called “Switch back to primary SIM card after timeout” becomes available:
| Field | Value | Description |
| Switch back to primary SIM card after timeout | yes | no; default: no | Attempts to switch back to the primary SIM card once the specified period of time passed. |
| Initial timeout (min) | integer; default: 1 | Indicates a time value (in minutes) after which the device will attempt to switch back to the primary SIM card. |