Difference between CDMA and GSM
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CDMA (Code Division Multiple Access) and GSM (Global System for Mobile Communications) are mobile communication technologies with key differences:
1. **Technology**: CDMA uses unique codes for each call, while GSM relies on time slots.
2. **Compatibility**: CDMA and GSM devices are generally not compatible.
3. **SIM Cards**: GSM uses SIM cards, while CDMA typically does not.
4. **Global Reach**: GSM is more widespread globally.
5. **Voice Quality**: CDMA often provides better call quality.
Overall, they differ in technology, compatibility, SIM card usage, global reach, and voice quality.