For those who want to own an unlocked iPhone 6, they can visit T-Mobile stores to purchase one.

The pro of getting the unlocked smartphone is that users are not tied down to any particular wireless carrier's monthly plan. They won't be locked into a 2 year deal.

Users can use iPhone 6 anywhere in the world using any carrier. If they are traveling overseas, they just can use a SIM card from the country where they are currently located, and frequently, they get lower rates compare to U.S.

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Now, if the user's option is to buy on Apple Store, the Cupertino-based company has not yet started selling the unlocked version of iPhone 6.

Usually, Apple prefers to sell their devices under contract. It's due to the credit they get whenever the user makes a phone call using the iPhone which is under contract from wireless carriers like Verizon and AT&T.

There are reports saying that Apple will no longer use the term 'unlocked iPhone' anymore.

So, if users are decided to have the unlocked iPhone 6, T-Mobile is the best option for them.

T-Mobile offers the unlocked iPhone 6 with the price starts at US$649. Users can now use any SIM they want.

iPhone 6 off the contract starts at US$649 for 16GB version. The 64GB is US$749 while the 128GB costs US$849. Lastly, the unlocked iPhone 6 Plus without the contract costs US$749.

TagsUnlocked iPhone 6, T-Mobile