hi I am a complete newbie to Iphone (and smartphone as well)
i am going to buy either iphone4S or iphone 5
but I've got a few questions in mind.
1. what is "lock" and what is "unlock"? If I buy the phone , together with a SIM card, signing contract with the service provider. will they lock my phone to the SIM card? If my phone is "lock" , does it mean that I can only use one SIM card
If I travel to other countries / constituents and I have to buy a temporary SIM card, will I expereince difficult time using Iphone in other countries.
2. What do I have to check about / pay attention to the phone when I first get the phone in front of the salesperson, to ensure that it worths my money
(Since I sign contract with a service provider and they will give me the phone. but they are not official. I doubt their integrity so I can only trust myself, so I want to ask here about first)