The following countries are not supported for SMS verification:
- 54 Argentina
- 1-242 Bahamas
- 375 Belarus
- 32 Belgium
- 55 Brazil
- 257 Burundi
- 1 Canada
- 1-345 Cayman Islands
- 236 Central African Republic
- 56 Chile
- 86 China*
- 57 Colombia
- 243 Congo, Democratic Republic
- 506 Costa Rica
- 380 Crimea region of Ukraine
- 53 Cuba
- 1-809, 1-829, 1-849 Dominican Republic
- 593 Ecuador
- 503 El Salvador
- 594 French Guiana
- 1-671 Guam
- 852 Hong Kong
- 36 Hungary
- 91 India
- 98 Iran
- 996 Kyrgyzstan
- 961 Lebanon
- 218 Libya
- 60 Malaysia
- 52 Mexico
- 377 Monaco
- 95 Myanmar
- 674 Nauru
- 64 New Zealand
- 505 Nicaragua
- 850 North Korea
- 507 Panama
- 595 Paraguay
- 51 Peru
- 1-787, 1-939 Puerto Rico
- 7 Russia
- 381 Serbia
- 252 Somalia
- 27 South Africa
- 82 South Korea
- 211 South Sudan
- 268 Swaziland
- 963 Syria
- 886 Taiwan
- 380 Ukraine
- 1 United States
- 598 Uruguay
- 58 Venezuela
- 967 Yemen
- 263 Zimbabwe