One of the best-selling products in Tony's mobile-telephone store in Chungking Mansions is a prayer phone for Muslims made on the mainland. The phone is equipped with Urdu software and even comes with a 'mini sound box' - resembling a scaled-down boombox - to broadcast the call to prayer.
The irony of such phones churned out in a country that is officially atheist and where no one speaks Urdu is lost on Tony, a Pakistani. 'Chinese people can even copy Ferraris, this is nothing for them,' he said.
The prayer phone, made to order for the Pakistani market, is one of his most popular products, with about 25,000 units sold last month.
Some of the products sold in the dark, labyrinthine world of this Hong Kong landmark make the average Nokia or Motorola look positively primitive.
'Every phone we sell can fit two SIM cards,' bragged Tony, saying he finds it strange that such sophisticated and useful technology has not caught on among mainstream brands.
He then pulled out a popular 'battery-less' model. These phones, he said, will continue to work for two days even after the battery is removed. 'This is really useful in countries where the weather, or just poor infrastructure, makes electricity supply unreliable,' he said, which would be the case for the majority of Chungking Mansions' mobile-phone destinations in Africa and South Asia.