Abstract: The invention is based on a platform that has both hardware and software. The latter includes, amongst other things, an algorithm to solve the problem encountered when, on passing between countries and operators, data services have to roam between mobile networks. The invention handles and solves existing technical limitations such as existing roaming logic for switches between operators not taking into account: which services the ‘original’ operator has activated; geographical coverage; different costs for different services; and, whether services other than speech can function in the selected network.

Abstract: The invention is based on a platform that has both hardware and software. The latter includes, amongst other things, an algorithm to solve the problem encountered when, on passing between countries and operators, data services have to roam between mobile networks. The invention handles and solves existing technical limitations such as existing roaming logic for switches between operators not taking into account: which services the ‘original’ operator has activated; geographical coverage; different costs for different services; and, whether services other than speech can function in the selected network.

Abstract: The invention is based on a platform that has both hardware and software. The latter includes, amongst other things, an algorithm to solve the problem encountered when, on passing between countries and operators, data services have to roam between mobile networks. The invention handles and solves existing technical limitations such as existing roaming logic for switches between operators not taking into account: which services the ‘original’ operator has activated; geographical coverage; different costs for different services; and, whether services other than speech can function in the selected network.

Abstract: Mobile telephones are often used during transport involving risk, and in that case to call for help. However, the mobile telephone may be blocked by the perpetrator of a crime. The present invention solves this problem since, whether it is in use or not, a mobile telephone continuously emits a signal. An alarm will be triggered in the absence of a signal at a receiving unit, which receiving unit may be an alarm centre or an Internet system.

Abstract: The invention is based on a platform that has both hardware and software. The latter includes, amongst other things, an algorithm to solve the problem encountered when, on passing between countries and operators, data services have to roam between mobile networks. The invention handles and solves existing technical limitations such as existing roaming logic for switches between operators not taking into account: which services the “original” operator has activated; geographical coverage; different costs for different services; and, whether services other than speech can function in the selected network.

Abstract: Mobile telephones are often used during transport involving risk, and in that case to call for help. However, the mobile telephone may be blocked by the perpetrator of a crime. The present invention solves this problem since, whether it is in use or not, a mobile telephone continuously emits a signal.