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2. 4G - Wikipedia

   en.wikipedia.org/wiki/4G

   The pre-4G 3GPP Long Term Evolution (LTE) technology is often branded "4G – LTE", but the first LTE release does not fully comply with the IMT-Advanced requirements. LTE has a theoretical net bit rate capacity of up to 100 Mbit/s in the downlink and 50 Mbit/s in the uplink if a 20 MHz channel is used — and more if multiple-input multiple ...

3. Cellular frequencies - Wikipedia

   en.wikipedia.org/wiki/Cellular_frequencies

   Many GSM phones support three bands (900/1,800/1,900 MHz or 850/1,800/1,900 MHz) or four bands (850/900/1,800/1,900 MHz), and are usually referred to as tri-band and quad-band phones, or world phones; with such a phone one can travel internationally and use the same handset. This portability is not as extensive with IS-95 phones, however, as IS ...

4. LTE frequency bands - Wikipedia

   en.wikipedia.org/wiki/LTE_frequency_bands

   Networks on LTE bands 1, 3 (LTE-FDD) are suitable for roaming in ITU Regions 1, 3 and partially Region 2 (e.g. Costa Rica, Venezuela, Brazil and some Caribbean countries or territories. Networks on LTE band 20 (LTE-FDD) are suitable for roaming in ITU Region 1 only. Networks on LTE band 5 (LTE-FDD) are suitable for roaming in ITU Regions 2 and 3.

5. These Are The Best Cell Phones for Seniors to Stay Connected

   www.aol.com/best-cell-phones-seniors-stay...

   Some cell phones for seniors are only compatible with certain carriers, or require a monthly payment plan and a contract. Alternatively, you can purchase smartphones unlocked, which allows you to ...

6. Comparison of mobile phone standards - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_mobile_phone...

   Cellular network standards and generation timeline. This is a comparison of standards of wireless networking technologies for devices such as mobile phones.A new generation of cellular standards has appeared approximately every tenth year since 1G systems were introduced in 1979 and the early to mid-1980s.

7. The 6 best cellphones for seniors in 2025 - AOL

   www.aol.com/lifestyle/best-cellphone-seniors...

   The phone itself is quite affordable, and service plans start at just $20 per month. While it’s not the most capable smartphone available, it is a great option for seniors looking for the basics ...