m:tel BA- m:tel ME
M1 SG- Magenta AT
Magenta-T- AT
MAGTICOM GE- Makedonski Telekom MK
Manx Telecom GB- Manx Telecom IM
- manxprepaid IM
masmovil ES- Mattel MR
Maxis50212 MY- Maxis50217 MY
- mcel MZ
- mci IR
- Mediacom Mobile US
- Mediatech SC
- megacable MX
- megacom KG
- MegaCom KG
MegaFon RU- MegaFon TJ
- megamovil MX
Melita MT- membersmobile US
MEO PT- meo_pt PT
Metfone45608 KH- Metfone45609 KH
- mettel US
- miatel RU
- Midrivers US
Mint Mobile and Ultra Mobile US- mobi US
- Mobi US
mobicom MN- Mobicom MN
Mobifone VN- MobiFone VN
Mobiland AD- Mobilenation US
- MobileNation US
- mobiler ES
Mobilis DZ
mobily SA- Mobily SA
- Mobipcs US
Mobitel SI- Mobitel IQ
- Mobitel SL
- Mobitel LK
- Mobiuz UZ
- Mohave US
Moldcell MD- MoldCell MD
- Moldtelecom MD
MonacoTelecom MC- Moov MR
- Moov BF
- Moov TG
- Moov CF
Moov GA- MOOV CI
- Mosaic Mobile US
- Mosaic RPA US
- Mosaic RPO US
- Mosaic RPT US
- Movicel AO
- movil CO
