Take the GSM system influenced by cell phone jammer

Take the GSM system influenced by cell phone jammer for example in this text.
TFD screen. The TFD (Thin Film Diode) screen, also known as the transflective liquid crystal display of the thin film diode. The largest in terms of the conditions of the backlight off (reflective mode) or turn on the backlight (transmissive mode) can provide high-quality, easy to watch display, and has the advantages of low power, high-quality, high speed of response. UFB screen. UFB (Ultra Fine & Bright) screen is a liquid crystal display screen, developed by South Korea's Samsung, which is characterized by ultra-thin and high brightness. UFB screen is designed using a special grating design, can reduce the pixel pitch in order to obtain better image quality. Usually UFB screen can display 65,536 colors, and can reach 128 × 160 pixel resolution. High-power electromagnetic radiation of cell phone jammer is not harmful to people’s health.
UFB screen contrast is twice that of the STN liquid crystal display. IMEI code cell phones at the factory will be written to a unique electronic serial number, that is commonly referred to as lMEl code, its role is as if each person's identity card number. In standby mode, as long as the corresponding command key, the phone will show lMEl yards. PIN. Phone PIN code (PersonalIdentificationNumber) code's main role is to prevent the loss of the SIM or UIM card stolen to play the set, when set the phone to "lock card" function, open the phone power will be prompted to enter the PIN code, Only by correctly enter the PIN code, the mobile phone to be registered networking, otherwise, can not be used. The omnidirectional antenna of cell phone jammer will adopts the most convenient direction.In addition, the Bluetooth technology of this 2.4GHz frequency band divided into 79 sub-bands, in order to adapt to the military needs of some countries, the Bluetooth 1.0 to redefine the criteria for the classification of another cover band, the whole band is divided into 23 sub-bands to avoid using the 2.4GHz band in the designated area. This has resulted in the use of 79 sub-band equipment that are designed for the use of 23 sub-band devices are not compatible. Bluetooth 1.1 standard has canceled Vice standards of the 23 sub-band, Bluetooth 1.1 devices to communicate with each other 79 sub-bands within the 2.4 GHz spectrum range. Please inquire any time any nonconformance of cell phone jammer is found.
In addition, the Bluetooth 1.1 specification also fixes the problem of incompatible data formats will lead to interoperability problems between Bluetooth 1.0 devices, to allow convergence devices to take the initiative with the master device to communicate and inform the master package size information. Bluetooth 1.1 specification, and the convergence device can, when necessary to inform the master device sends packets containing more than / less slots.