By Bilal Ansari (ku) ISLAMABAD, July 28 (Reuters) - Pakistan plans to issue its first licences for third-generation (3G) mobile telecom services in October, hoping to generate nearly $1 billion through an open auction, government officials said on Thursday. The fifth-largest cellular market in Asia -- behind China, India, Indonesia and Japan -- had more than 107 million mobile users in April, almost 65 percent of all Pakistanis. "A committee of the cabinet has agreed in principle to launch 3G services as soon as possible without any conditions," a senior official of the Ministry of Information Technology, which is handling the project, told Reuters. The Economic Coordination Committee is expected to green-light the auction in the first week of August. The auctions are expected...