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2. Comparison of mobile phone standards - Wikipedia

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

   In 3G, the most prevalent technology was UMTS with CDMA-2000 in close contention. All radio access technologies have to solve the same problems: to divide the finite RF spectrum among multiple users as efficiently as possible. GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM.

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

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

   The A23 5G is Samsung's entry-level Galaxy phone, but it still offers plenty of great features that make it senior-friendly, including the “Easy Mode,” which simplifies the interface.

4. Circuit Switched Data - Wikipedia

   en.wikipedia.org/wiki/Circuit_Switched_Data

   However, unlike TDMA, there are no time slots, and all CDMA radios can be active all the time to deliver up to 14.4 kbit/s data transmission speeds. With the evolution of CDMA to CDMA2000 and 1xRTT, the use of IS-95 CDMA Circuit Switched Data declined in favour of the faster data transmission speeds available with the newer technologies.

5. List of wireless network protocols - Wikipedia

   en.wikipedia.org/wiki/List_of_wireless_network...

   True 3G systems such as EV-DO, W-CDMA (including HSPA and HSPA+) provide combined circuit switched and packet switched data and voice services from the outset, usually at far better data rates than 2G networks with their extensions. All of these services can be used to provide combined mobile voice access and Internet access at remote locations.

6. The best cellphones for seniors in 2023 - AOL

   www.aol.com/lifestyle/best-cell-phone-seniors...

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7. The best tech for adults over 65 we spotted at CES this year

   www.aol.com/lifestyle/ces-2025-aging-in-place...

   We found the best technology for adults over 65 at CES this year. From AI aids to ‘aging in place’ smart home solutions, the annual tech show kept older users in mind.