LONDON (Dow Jones)--Mobile technology firm Mobile Tornado Group PLC (MBT.LN) Friday said it has won an order to provide its push-to-talk technology platform to a major Indian mobile operator. Mobile Tornado will also install and configure the system in the unnamed operator's network. No financial details were disclosed but the firm said delivery of the first phase of the contract, for 200,000 users, has already begun, with additional licenses to be added as the market grows. Push-to-talk works by allowing a caller to reach an active talk group by pressing a single button rather than having to make several calls to co-ordinate with a group. Mobile Tornado said the platform helps mobile operators grow revenue and retain customers. -By Hannah Benjamin, Dow Jones Newswires; 44-20-7842-9298; [email protected] (END) Dow Jones Newswires June 18, 2010 02:19 ET (06:19 GMT)