Is there a convenient way to get a Wireless@SG password without having a Singapore mobile phone number? I know the website says you can "can visit any of the operators' customer service centres to register and collect their passwords". But is it a hassle? I assume these centres are more interested in selling their products than dealing with clueless tourists looking for free wi-fi.

Is there any reason to choose one of the three providers (iCell, QMax, SingTel) over the others?