Finally possible to send an alarm with double SIM-cards.

Increase your security with double sim cards!

The forest industry and the train indusry are two of the industries where employees are often in places with inadequate coverage. Poor coverage is a risk factor for the employee as it cannot alarm if the accident occur, or a threatening situation arises.

We at Crystal Alarm are therefore very pleased that it is now possible to alarm with double sim cards, from various telephone operators, on Android phones. This helps to increase the coverage, which ensures the possibility of being able to alarm.

For this solution to work, you need to contact us at Crystal Alarm, since this is a setting that we need to activate manually.

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