TORONTO - Rogers Wireless announced Wednesday that it will be turning down its older TDMA and analog networks effective May 31, 2007 and will move customers on these older networks onto its advanced GSM network. GSM, which stands for Global System for Mobile Telecommunications, is proven for its superior coverage and signal quality and is used by 80% of the world's wireless customers including the vast majority of Rogers customers in Canada, says the press release. "By transitioning subscribers who are still on our TDMA and analog networks to our more advanced GSM service, these customers will enjoy the benefits...