Transtek work closely with our partner Ecom Instruments to provide the very best in intrinsically safe mobile technology. The current range of phones are GSM units based on the very highly regarded Sonim ruggedised product range. They are ACMA 'A' Tick and 'C' Tick approved and are true industrial phones with impact resistant 'Gorilla Glass' displays, loud ring capability and strong vibration modules for noisy environments. If you're looking for a 3G or 4G device, these aren't available yet but they are in development...