a) What are the different types of phones and connections used to date?
Earlier to Newer Telephones:
2. Desktop Rotary
3. Touch Tone
4. Wall Touch Tone
5. Cordless Phone
6. Mobile (Cell Phone)
8. Satelite Mobile
1G - Analog cellular
2G - Digital cellular
3G - Mobile Broadband
4G - Native IP networks
5G - Cellular Mobile Communications
b) What is the difference between WLL and mobile phone connection?
Wireless Local Loop (WLL) connects wireless connections to the PSTL using wireless technology makes a circuit between wireless users and exchange. And CDMA is a technology that transmits wireless calls by assigning the codes and many users can share the same frequency. GSM is a digital cellular communication technology accepted globally. And EDGE is an extraordinary step if GSN for faster data transmission.
c) How to select the best one suitable for our use?
The choosing of best will depend on your handset (Cell phone) and service provider. For example, if you have a cell phone that supports 3G then to get higher 4G then you need to get a new supported cellphone and the service provider that provides 4G service.
d) What are the different features available on these phones?
Application processor (CMOS system on a chip), Flash memory, Cellular modem, RF transceiver, Phone camera image sensor, Power Management Circuit, Bluetooth, WiFi, USB, Cameras (Front and Rear), Infrared, Memory Card Reader, GPS Navigation, Personal Digital Assistant, etc.
e) What is the latest technology used in phones these days?
iPhone mobile technology is an advanced technology. 5G is the best technology but the networks are still limited in speed and availability across the country,
f) Any other additional details on the subject?
Voice Over LTE (VoLTE) is a latest technology in cell phones for HD calling.