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…
China Mobile Intl Head Office Level 30, Tower 1, Kowloon Commerce Centre, No. 51 Kwai Cheong Road,…
Saudi Telecom Head Office Saudi Telecom Company, King Abdul Aziz Complex Mursalat Riyadh, Riyadh Saudi Arabia Saudi…
Ooredoo Head Office West Bay, PO Box 217, Doha, Qatar Ooredoo Customer Service Phone: 111 (from Ooredoo…
SkyCable Head Office 6th Floor ELJ Communications Center, Mother Ignacia Avenue, Quezon City, Philippines SkyCable Customer Service…
Rogers Head Office Rogers Communications Inc. 333 Bloor Street East, 10th floor, Toronto, Ontario M4W 1G9, Canada…
Shaw Head Office Shaw Communications Inc. Suite 900, 630 – 3rd Avenue S.W., Calgary, Alberta Canada T2P…
Vodacom Head Office Vodacom Corporate Park 082 Vodacom Boulevard Vodacom Valley Midrand 1685, South Africa Phone: 011…
NBN Co Customer Service Phone: 1800 881 816 Phone: 1800 555 677 (TTY) Email: info@nbnco.com.au NBN Co…
MTN Head Office 14th Avenue Johannesburg 2196 South Africa Phone: +27 11 912 4123 MTN Customer Service…
Telstra Australia Telstra Head Office 242 Exhibition Street Melbourne, VIC 3000 Australia Telstra Customer Service Phone: 13…
Globe Telecom Head Office Globe Telecom Inc. 5th Floor, Globe Telecom Plaza Pioneer corner Madison Street 1552…
Smart Philippines Head Office Smart Communications, Inc. Smart Tower, 6799 Ayala Avenue Makati, Philippines 1226 Smart Customer…
DiGi Customer Service Phone: 016 2211800 or dial *128# (from DiGi phone) DiGi Head Office D’House, Lot…
Dialog Head Office Dialog Axiata PLC, 475, Union Place, Colombo 02, Sri Lanka Phone: +94 777 678…
Mobitel Head Office Mobitel (Pvt) Ltd 108, W.A.D Ramanayake Mawatha, Colombo 02, Sri Lanka Phone: +94 (0)…
Telenor Pakistan Head Office 13-K, Moaiz Center, F-7 Markaz, Islamabad, Pakistan Phone: +92 51 111 345 700…
U Mobile Customer Service Phone: +6018 388 1318 U Mobile Head Office U Mobile Sdn Bhd Lot…