Different Bands in Mobile Telecommunication?

Telecom mobile communication systems use various frequency bands to provide wireless services. Different countries and regions allocate specific frequency bands for mobile communication services, and the exact frequency ranges can vary. Here are some of the commonly used frequency bands in mobile communication:

1. **GSM (Global System for Mobile Communications):**

   - GSM 900 MHz: 890-960 MHz (Europe, Asia, Africa, Australia)

   - GSM 1800 MHz (DCS): 1710-1880 MHz (Europe, Asia, Africa)

   - GSM 850 MHz: 824-894 MHz (North America, South America, Caribbean)

2. **UMTS (Universal Mobile Telecommunications System) / 3G:**

   - UMTS Band I: 1920-1980 MHz (IMT, Europe, Asia)

   - UMTS Band II: 1850-1910 MHz (PCS, North America)

   - UMTS Band V: 824-849 MHz (Cellular 850, North America)

   - UMTS Band VIII: 880-915 MHz (GSM 900, Europe, Asia)

   - UMTS Band IV: 1710-1755 MHz (AWS, North America)

   - UMTS Band IX: 1755-1780 MHz (IMT, Europe)

   - UMTS Band X: 2110-2155 MHz (AWS, North America)

3. **LTE (Long-Term Evolution) / 4G:**

   - LTE Band 1: 1920-1980 MHz (IMT, Global)

   - LTE Band 2: 1850-1910 MHz (PCS, North America)

   - LTE Band 3: 1710-1785 MHz (DCS, Europe, Asia)

   - LTE Band 4: 1710-1755 MHz (AWS, North America)

   - LTE Band 5: 824-849 MHz (Cellular 850, North America)

   - LTE Band 7: 2500-2690 MHz (IMT, Global)

   - LTE Band 8: 880-915 MHz (GSM 900, Europe, Asia)

   - LTE Band 12: 699-716 MHz (Lower 700, North America)

   - LTE Band 20: 832-862 MHz (800 MHz Digital Dividend, Europe, Asia)

4. **5G NR (New Radio) / 5G:**

   - 5G NR Band n77: 3300-4200 MHz (C-Band, Global)

   - 5G NR Band n78: 3300-3800 MHz (3.8 GHz Band, Global)

   - 5G NR Band n41: 2496-2690 MHz (2.5 GHz Band, Global)

   - 5G NR Band n71: 600-6000 MHz (600 MHz Band, Global)

Please note that these are general frequency ranges, and specific countries and regions may have variations and additional frequency bands allocated for mobile communication. Additionally, there are sub-bands and carrier aggregation techniques used to combine multiple frequency bands for higher data speeds and capacity in 4G and 5G networks. The exact frequency bands used by a mobile operator depend on licensing and regulatory decisions in the respective countries and regions.