[1] It uses the EE network[2] via an MVNO agreement signed in March 2014[3] as well as using the spectrum BT won in the 2013 4G auction.

The app also shows out-of-contract spending, details of the subscribers' contract and information on data roaming.

BT Mobile offers 4G as standard to all customers at no extra cost and in order to benefit from 4G speeds, a 4G-ready phone is required.

The speed will vary on a day-to-day basis and depends on various things such as coverage, distance from the mast, the number of people using the network and the type of 4G phone you have, as well as whether you're indoors or in a densely populated area.

[15][16] BT introduced Wi-Fi Calling on 29 March 2018, which allows customers to use Wi-Fi to call and text in areas with poor or no signal, and will come out of their monthly minutes and texts allowance or at the normal network rate, with no extra charge.

The phone's software must be updated to take benefit of the service, minimum iOS 11.3 or later for Apple handsets.

[24] BT Mobile offers free parental controls to limit what a user can access via the internet such as blocking inappropriate content.