Updated: November, 2016
BT uses EE's 4G network (which it now also owns), so you can look at that to see its level of coverage. EE currently has 4G available in over 666 major towns and cities and more than 6,900 smaller towns and villages and is the market leader.
EE has over 97% UK population coverage with its 4G network and is aiming for 98% of the UK population to be covered ASAP. The network also has over two thirds of the UK geographically covered and, according to OpenSignal, its customers can get a 4G signal 60.60% of the time, all of which is more than any other UK network.
Types of 4G from BT:
4G from BT uses the following network frequencies:
Find out more about 4G frequencies in the UK here.
Check BT Coverage in your area here.
4G from EE and by extension BT is now available in over 666 large towns and cities including but not limited to: Aberdeen, Abingdon, Accrington, Aldershot, Altrincham, Amersham, Antrim, Armadale, Armagh City Ashby-De-La-Zouch, Ashford (Kent), Ashford (Surrey), Ashton-In-Makerfield, Ashton-Under-Lyne, Aylesbury, Ballymena, Banbridge, Bangor, Barnsley, Basildon, Basingstoke, Bath, Beaconsfield, Bedford, Belfast, Bellshill, Belper, Benfleet, Berkhamsted, Bicester, Billericay, Bingley, Birkenhead, Birmingham, Bishop Auckland, Bishop’s Stortford, Blackburn, Blackpool, Bolton, Bournemouth, Bracknell, Bradford, Braintree, Brentwood, Bridgend, Brighouse, Brighton, Bristol, Brownhills, Buckingham, Burnley, Burntwood, Burton Upon Trent, Caerphilly, Camberley, Cambridge, Cannock, Cardiff, Castleford, Coalville, Caldicot, Canvey Island, Carlisle, Carrickfergus, Chatham, Chelmsford, Cheltenham, Chepstow, Chesham, Chester, Chester-Le-Street, Cheshunt, Chesterfield, Chorley, Clydebank, Coatbridge, Colchester, Coleraine, Corringham, Coventry, Craigavon, Crawley, Cumbernauld, Cwmbran, Dalkeith, Darlington, Derby, Dewsbury, Doncaster, Dudley, Dumbarton, Dundee, Dungannon, Durham, Edinburgh, East Grinstead, Ellesmere Port, Exeter, Farnborough, Farnham, Faversham, Fleet, Fleetwood, Formby, Frimley, Gateshead, Gerrards Cross, Gillingham, Glasgow, Glossop, Gloucester, Grangemouth, Gravesend, Grays, Grimsby, Guildford, Guiseley, Halifax, Hamilton, Harlow, Harpenden, Harrogate, Hartlepool, Hatfield, Hebburn, Helensburgh, Hemel Hempstead, Hertford, High Wycombe, Hinckley, Hitchin, Hoddesdon, Houghton-Le-Spring, Holywood, Horsham, Huddersfield, Hull, Hythe, Ilkeston, Ipswich, Jarrow, Keighley, Kenilworth, Keynsham, Kirkby, Kirkintilloch, Larne, Leatherhead, Leeds, Leicester, Leigh, Leighton Buzzard, Letchworth, Leyland, Lichfield, Lincoln, Lisburn, Liverpool, Livingston, London, Londonderry/Derry, Loughborough, Luton, Lytham St Annes, Macclesfield, Maidenhead, Maidstone, Manchester, Mansfield, Marlow, Merthyr Tydfil, Milton Keynes, Middlesbrough, Motherwell, Nailsea, Neath, Newbury, Newcastle, Newcastle Under Lyme, Newport, Newry, Newton Abbot, Newtownabbey, Newtownards, Northampton, Norwich, Nottingham, Nuneaton, Oldham, Omagh, Ormskirk, Oxford, Paignton, Peterborough, Peterlee, Plymouth, Pontypool, Poole, Pontefract, Portishead, Portsmouth, Port Talbot, Potters Bar, Prestatyn, Preston, Ramsbottom, Rayleigh, Reading, Redcar, Redhill, Reigate, Rhyl, Richmond, Rochdale, Rochester, Rotherham, Rugeley, Runcorn, Sale, Saltash, Sandhurst, Sevenoaks, Sheerness, Sheffield, Shipley, Sittingbourne, Skelmersdale, Slough, Southampton, Southend-On-Sea, Southport, South Shields, Spennymoor, Stevenage, St Albans, Stafford, Staines, Stockport, Stockton-On-Tees, Stoke, Strabane, Sunderland, Sutton Coldfield, Sutton in Ashfield, Swadlincote, Swansea, Swindon, Swinton, Tamworth, Telford, Thame, Thornaby-on-Tees, Tilbury, Tonbridge, Torquay, Totton, Tyldesley, Tunbridge Wells, Wakefield, Wallasey, Walsall, Waltham Abbey, Walton-On-Thames, Ware, Warrington, Washington, Watford, Welwyn Garden City, Weston-Super-Mare, West Bromwich, Wickford Widnes, Wigan, Wimborne Minster, Windsor, Witney, Woking, Wolverhampton, Wombourne, Worksop, Wishaw and York. Recent locations to get EE 4G and by extension BT 4G include Coll, Shetland Islands, Isles of Scilly, Ilfracombe, Ashbourne and Upton-upon-Severn.
BT's new Extra Speed service is available as an optional add-on, doubling 4G speeds to up to 60Mbps. It's available in many of the same places as standard 4G.
BT doesn’t currently offer any cheap or inclusive roaming for data, texts or calls, though the charges aren't too extreme. In France for example you'll pay 4.3p per megabyte of data.