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An iPhone 4 A1332 with a micro-SIM card removed with a paper clip, showing its SIM card compartment. The GSM iPhone 4 uses a micro-SIM card, which is positioned in an ejectable tray, located on the right side of the device. The CDMA iPhone 4, however, the phone connects to the network using an ESN. All prior models have used regular mini-SIM ...
GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM. Time-division multiple access (TDMA) provides multiuser access by chopping up the channel into sequential time slices. Each user of the channel takes turns to transmit and receive signals.
A selection of mobile phones that can be cloned. Code-Division Multiple Access (CDMA) mobile telephone cloning involves gaining access to the device's embedded file system /nvm/num directory via specialized software or placing a modified EEPROM into the target mobile telephone, allowing the Electronic Serial Number (ESN) and/or Mobile Equipment Identifier (MEID) of the mobile phone to be changed.
The iPhone 4s uses the same proprietary 30-pin dock connector that is used on the iPhone 4, which was first introduced in the 3rd generation iPod. The iPhone 4s has an improved cellular (GSM) antenna design over the iPhone 4. The new antenna is divided up into two pieces within the stainless steel band that wraps around the sides of the smartphone.
Leap Wireless (1999–2014) AT&T (2014–present) Website. www.cricketwireless.com. Cricket Wireless LLC is an American prepaid wireless service provider, wholly-owned by AT&T. It provides wireless services to thirteen million subscribers in the United States as of 2022. [3] Cricket Wireless was founded in March 1999 by Leap Wireless International.
The Preferred Roaming List (PRL) is a database residing in a wireless (primarily CDMA) device, such as a cellphone, that contains information used during the system selection and acquisition process. In the case of R-UIM -based CDMA devices, the PRL resides on the R-UIM. The PRL indicates which bands, sub bands, and service provider identifiers ...
The card also contains SIM (GSM) application, so it can work on both networks. It is physically compatible with GSM SIMs and can fit into existing GSM phones as it is an extension of the GSM 11.11 standard. [1] This interface brings one of the main advantages of GSM to CDMA network phones. By having a removable identity card, CDMA users can ...
Mobile equipment identifier. A mobile equipment identifier (MEID) is a globally unique number identifying a physical piece of CDMA2000 mobile station equipment. The number format is defined by the 3GPP2 report S.R0048 but in practical terms, it can be seen as an IMEI but with hexadecimal digits. An MEID is 56 bits long (14 hexadecimal digits).