Mobile phone development Combat 3--mobile Phone type introduction

According to the Supported communication Protocol classification:

mobile phones usually have 2G , 2.5G , 2.75G , 3G and 4G ( G - Generation generation) and so on.

only support GSM the protocol of the mobile phone is called 2G mobile phone, support is - 95CDMA the protocol of the phone also belongs to 2G mobile phone;

Support GPRS the protocol of the phone is 2.5G ;

Support EDGE the protocol of the phone belongs to 2.75G ;

Support WCDMA , CDMA2000 and the TD-SCDMA the protocol of the phone belongs to 3G mobile phone;

supports LTE-TDD and LTE-FDD the protocol of the phone belongs to 4 G mobile phone;

According to the operating system classification used:

smart phone ( smart phone - using an open operating system, such as symbian Iphone windows Mobile andriod

Feature Phones ( Feature Phone ) - using a real-time embedded operating system such as Nucleus , THREADX only software that is supported by a specific platform, such as J2ME , Brew and the VRE platform application software.

according to the accommodated SIM Card number classification:

Single card-only one card is accommodated.

Dual SIM phone-accommodates two cards, according to the type of two cards, divided into ordinary dual-SIM phone and dual-mode mobile phone.

Ordinary dual sim phones usually have two built-in sim Span style= "font-size:12pt" > You can send and receive SMS and phone calls. Just one RF antenna, because of intermittent contact between the phone and the base station, such as a-b-c-d four time periods, The original phone is only in a c time period and base station contact, now change to BD The time period also contacts the base station, handling the sim2

Dual-mode dual-cell phones usually refer to two types of mobile phone support, such as wcdma+gsm or cdma+gsm , built-in two different types of mobile phone cards, such as SIM and the UIM . Requires two sets of RF systems, with two antennas.

Relative to the single-card mobile phone, dual-SIM phone and base station communication frequency doubled ÷ time doubled, while the mobile phone status bar has two signal areas, mobile phone signal changes, you have to refresh the display, the number of mobile phone brush screen also increased, these two factors will cause the phone power consumption also increased.

in many countries the need for mobile phones to have legal IMEI number, so that dual sim phones have to have two legal IMEI number or MEID number.

Classification by Structure type:

Bar, slide and flip phone

Different structure types, resulting in different functional requirements:

These two types of phones are equipped with a locking keypad, as they are placed in their pockets, because they are directly exposed to the keyboard. Flip phone is not required.

for the sliding mobile phone, the user closed the slide, often means that the mobile phone will not be temporarily, so close the slide, the phone to return to IDLE back to the same flap when the lid is closed IDLE state. There is no demand for the straight-bar phone.

Mobile phone development Combat 3--mobile Phone type introduction