Customers can now go to an Orange or T-Mobile store (which are currently being rebranded as EE) to buy various different smartphones that can support 4G.
4G, also known as Long Term Evolution (LTE), can support mobile data speeds more than five times faster than current 3G.
Apple's new Long Term Evolution (LTE) iPhone 5 is already on sale at Orange and T-Mobile stores, and from today it is joined by the Samsung Galaxy S3 LTE, HTC One XL and Huawei Ascend P1 LTE.
EE has confirmed that the Samsung Galaxy Note 2 LTE smartphone/tablet hybrid will become available from October 15.
The Nokia Lumia 920 is to be added to the EE 4G range when it comes to the UK.
Orange and T-Mobile customers with 4G-ready handsets will be able to upgrade to EE's new LTE service when it launches on October 30.
These customers will be given a special 4G EE SIM so that they can access the service. The company is expected to announce further details, including pricing, at press event before the launch.
"We're delighted to now be offering our customers a range of 4G ready smartphones to choose from," said Pippa Dunn, the chief marketing officer of EE.
"Not only can they use their phones straight away on the UK's biggest 3G network, but they can also have the opportunity to be amongst the first to benefit from superfast 4G mobile speeds when we launch our EE brand on October 30."