Head Office WorldSIM 2 Spring Villa Road Edgware, London HA8 7EB United Kingdom Customer Service Phone: +44…
Head Office SafeLink Wireless PO Box 220009 Milwaukie, OR 97269-0009 United States Customer Service Phone: 1-800-Safelink (723-3546)…
Head Office 555 S. Old Woodward Ave. Suite 600 Birmingham, MI 48009 United States Customer Service Phone:…
Head Office Level 7, 40 Mount Street North Sydney, NSW 2060 Australia Customer Service Phone: 1555 or…
Head Office SingTel Optus Pty Ltd 1 Lyonpark Rd, Macquarie Park NSW 2113 Customer Service Phone: 133…
Head Office EE Limited Trident Place, Mosquito Way, Hatfield, Hertfordshire, AL10 9BW Customer Service Phone: 150 or…
Head Office Advanced Info Service PLC AIS Tower 1 414 Phaholyothin Rd., Samsen Nai Phayathai, Bangkok 10400…
Head Office 319, 22nd-41st floor Chamchuri Square Building, Phayathai Road, Pathumwan, Bangkok 10330, Thailand Phone: +662-202 8000…
Head Office Walbrook Building 195 Marsh Wall London, E14 9SG United Kingdom Customer Service Phone: 322 or…
Head Office 401 Old Pretoria Main Road, Halfway House, Midrand 1685 Johannesburg, South Africa Customer Service Phone:…
Head Office Al Salam Tower, Dubai Media City P.O.Box: 502666, Dubai, UAE Phone: +971 4 360 00…
Head Office PLDT Inc Ramon Cojuangco Building Makati Ave., Makati City, Philippines Customer Service Phone: 1-800-10-6727277 (Home…
SoftBank Head Office SoftBank Group Corp. 1-9-1 Higashi-shimbashi, Minato-ku, Tokyo 105-7303 Phone: +81-3-6889-2000 SoftBank Customer Service Phone:…
KDDI Head Office Garden Air Tower, 3-10-10, Iidabashi, Chiyoda-ku, Tokyo 102-8460, Japan Phone: +81-3-3347-0077 KDDI Customer Service…
Beeline Russia Head Office PJSC VimpelCom 4 Krasnoproletarskaya Street Moscow, Russia 127006 Phone: +7 800 700-80-00 Beeline…
China Mobile Intl Head Office Level 30, Tower 1, Kowloon Commerce Centre, No. 51 Kwai Cheong Road,…
China Telecom Head Office China Telecom Corporation Limited 31 Jinrong Street, Xicheng District, Beijing 100033, China Phone: (8610) 66428166…
Saudi Telecom Head Office Saudi Telecom Company, King Abdul Aziz Complex Mursalat Riyadh, Riyadh Saudi Arabia Saudi…
Cincinnati Bell Head Office 221 East Fourth Street, Cincinnati, Ohio 45202, US Cincinnati Bell Customer Service Phone:…
FairPoint Head Office 521 E. Morehead St., Suite 500 Charlotte, NC 28202, United States FairPoint Customer Service Phone:…
Frontier Head Office 401 Merritt 7 Norwalk, CT, 06851 United States Phone: 1.203.614.5600 Frontier Customer Service Phone: 1.888.481.0526 Phone:…
Level 3 Communications Head Office 1025 Eldorado Boulevard Broomfield, Colorado 80021 Voice: 720-888-1000 – Level 3 Customer Service…
TDS Telecom Head Office TDS Telecommunications Corp 525 Junction Road Madison, WI 53717 United States TDS Telecom…
Turk Telekom Head Office Türk Telekomünikasyon A.?. Turgut Özal Bulvar? 06103 Ayd?nl?kevler Ankara Turk Telekom Customer Service…
Zong Pakistan Head Office CMPak Complex, Plot#47, Kuri Road, National Park Road, Chak Shahzad, Islamabad Zong Pakistan…
PTCL Head Office Block-E, Sector G-8/4, Islamabad-44000, Pakistan.s Fax: +92-51-2263733 E-mail:company.secretary@ptcl.net.pk PTCL Customer Care Phone: 1236 (from…
Nextel Mexico Head Office Comunicaciones Nextel de México, S.A. de C.V. Paseo de los Tamarindos No. 90…
Movistar Mexico Head Office Calle Prolongación, Paseo de la Reforma 1200, piso 18, Col. Cruz Manca, México,…
Telcel Head Office 2 Anáhuac Roma Sur Cuauhtémoc Mexico City Distrito Federal 11320, Mexico Telcel Customer Service…