Hey Sergio!
I think it depends on how long you're planning to stay in Hong Kong! If you stay a longer time, then getting a cell phone with a contract would be better. There are lots of providers, so just shop around and pick the one with the best offer for your phoning habits.
Good luck!
we got some fantstic products such as tv cellphone,dual sim card cellphone
watch cellpone and also have other great products lowprice and good quality is your best choice
just visit our website banggood dot com to get more infos about this.have fun~