- African Cellular
 - Resource to cellular & telecommunications in Africa. Info on GSM cellular networks, global cellular standards, GSM cellphones, accessories, network services & stats. - CellPoint
- Develops and implements software and services that allow GSM operators, ASPs, MVNOs, and portals to deliver location-based services to their subscribers.
- GSMinside.com
- Offers codes, logos, software, schematics, and other mobile accessories.
- interWAVE Communications
- Provider of compact wireless communications systems using GSM.
- Mobil Server
- Search engine for GSM and related links. Includes phone info, manufacturers, operators and more.
- Mobiq
- Offers custom-built mobile solutions to the music and media industries including Flash mobile stores, ringtones, and other mobile media.
 PMCG
- Provides GSM mobile training.- Round Solutions
- Manufacturer and distributor of GSM and GPRS modems and GSM antennas.
- Sendo
- Offers design and development of GSM mobile phones and other mobile communication devices.
- Wavecom (1)
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