An "unlocked phone" is one that can be uses on any wireless carrier network. Usually a wireless carrier (eg AT&T Wireless) locks a phone to ensure that the user stays with the two year contract that was agreed to at the time the first was first purchased at a large discount. This discount is called a phone subsidy.
An unlocked mobile phone can be purchased from all good mobile phone sellers. Try O2, Vodafone or Orange. Alternatively, visit webpages such as Ebay or Amazon.
You can't get a T Mobile service on a phone that's not T Mobile unless you get it unlocked. Once the phone is unlocked, you can use your T Mobile SIM card on it or any other GSM SIM cards worldwide.
Yes, An "Unlocked" Phone means you can put ANY operator ("Orange", "Vodafone" etc) SIM card in it.
Yes
You will have to first get the phone unlocked.
Unlocked phones can be used with any carrier, so it will support T-Mobile.
an unlocked phone could mean one of two things. One, the phone belongs to a GSM carrier (like T-mobile, or AT&T) but being that it is unlocked you can use it with any carrier that requires a sim card. The second can mean that it is a CDMA phone with GSM capabilities normally on a Sprint or Verizon Global phone meaning it is a CDMA phone with a sim card slot and as long as it is unlocked it can be used also with any other carrier that requires a sim card. However it has nothing to do with what is on the actual phone, so even if it says T-mobile it can still be an unlocked phone.
Unlocked mobile phones enable you to choose which service provider you use. This Enables you to find the best deal available for phone charges, rather than being stuck with the network that has locked the phone.
No you can not. If you enter a sim card that is not T-Mobile it will not read it. If the phone is unlocked then yes.
No. This phone is CDMA and cannot be unlocked.
No, T-Mobile is GSM and Verizon is CDMA so you can't switch between those two networks. Unlocked T-Mobile can be used on AT&T though.
Only if the T-Mobile phone is unlocked. If the T-Mobile phone is still locked, only T-Mobile SIMs will work.