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2. Comparison of mobile phone standards - Wikipedia

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

   This is used in GSM to separate cells, which then use TDMA to separate users within the cell. Code-division multiple access (CDMA) This uses a digital modulation called spread spectrum which spreads the voice data over a very wide channel in pseudorandom fashion using a user or cell specific pseudorandom code. The receiver undoes the ...

3. Time-division multiple access - Wikipedia

   en.wikipedia.org/wiki/Time-division_multiple_access

   Most 2G cellular systems, with the notable exception of IS-95, are based on TDMA. GSM, D-AMPS, PDC, iDEN, and PHS are examples of TDMA cellular systems.. In the GSM system, the synchronization of the mobile phones is achieved by sending timing advance commands from the base station which instruct the mobile phone to transmit earlier and by how much.

4. Comparison of smartphones - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_smartphones

   Asus ROG Phone 5 Pro 512 GB 16 GB Asus ROG Phone 5 Ultimate 18 GB Asus ROG Phone 5s Qualcomm Snapdragon 888+ Octa-core, (1 × 2.99 GHz + 3 × 2.42 GHz + 4 × 1.80 GHz Kryo 680) 128/256 GB 8/12/16 GB 172.8 mm × 77.3 mm × 9.9 mm Asus ROG Phone 5s Pro 512 GB 18 GB Xiaomi Black Shark 4 Qualcomm Snapdragon 870

5. List of wireless network technologies - Wikipedia

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

   CDMA2000 is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. It is a backwards-compatible successor to second-generation cdmaOne (IS-95) set of standards and used especially in North America and South Korea, China, Japan, Australia and New Zealand.

6. Mobile technology - Wikipedia

   en.wikipedia.org/wiki/Mobile_technology

   GSM: Global System for Mobile Communications; iDEN: Integrated Digital Enhanced Network; D-AMPS: Digital Advanced Mobile Phone System based on TDMA; cdmaOne: Code Division Multiple Access defined by IS-95; PDC: Personal Digital Cellular; TDMA: Time Division Multiple Access; 2.5G: A set of transition technologies between 2G and 3G wireless ...

7. Circuit Switched Data - Wikipedia

   en.wikipedia.org/wiki/Circuit_Switched_Data

   With the introduction of digital transmission in TDMA-based systems like GSM, CSD provided almost direct access to the underlying digital signal, allowing for higher speeds. At the same time, the speech-oriented audio compression used in GSM actually meant that data rates using a traditional modem connected to the phone would have been even ...

8. Your GSM cell phone conversations are not secure - AOL

   www.aol.com/2009/12/30/your-gsm-cell-phone...

   A security researcher has unveiled a decrypting method for phones that use the Global System for Mobile Communications (GSM). This means that if you are using a GSM cell phone, it has just gotten ...

9. List of devices using Qualcomm Snapdragon systems on chips

   en.wikipedia.org/wiki/List_of_devices_using...

   Asus PadFone mini 4.3, PadFone E, Atong H3, LG G2 Mini, G3 S D724, L90, L90 Dual, Microsoft Lumia 640, Lumia 640 XL, Mito Fantasy U, Motorola Moto G 8GB, Moto G dual 8GB, Moto G Colors Dual 16GB, Moto G (2nd Gen.), Nokia Lumia 630, Lumia 630 Dual SIM, Lumia 730 Dual SIM, Panasonic Eluga U, Prestigio PAP5507 Duo, Samsung Galaxy Grand 2, [115 ...