The confidentiality of the GSM mobile phone is much higher than the simulated mobile phone, and the model is rich and colorful and has global roaming. It has now become the preferred by the majority of users. You should pay attention to the following points: 1.GSM mobile phone can lock the card in addition to the lock machine, and the lock is forgotten to solve the problem by a variety of decryptors. However, if the PIN code is locked, the lock card is locked, due to the self-protection function of the GSM-SIM card, the mobile phone requires the PUK code to enter the PUK code, then output the wrong ten PUK code. So Sorry Your card over. At this time, Ericsson 388 will display SIM Card Blacked, and Panasonic G500 will display SIM ERORR or the like means SIM has "burned bad". 2.GSM mobile phone should not be used by the program-controlled phone, because the GSM mobile phone and the program call are very disturbed, and both parties can't hear. Maintenance and Maintenance The following recommendations Help you comply with the maintenance terms so that your phone can use many years. Using mobile phones, batteries, chargers, or accessories: 1. Place the phone and its components and accessories in a place where the child is touched. 2. Keep your phone to dry. Rainwater, moisture and liquid contain minerals and can corrode the electronic circuit board. 3. Do not use or store your phone in a dust or not clean, it may damage its detachable components. 4. Do not store your phone overheat. High temperatures will shorten the life of electronic devices, destroy the battery, and deform or melt in some plastic parts. 5. Do not store your phone in a cold place. When the phone temperature rises, the phone will form moisture and will destroy the board. 6. Do not try to remove the phone. Non-professionals will damage their mobile phones. 7. Don't throw, beat or vibrate your phone. Roughly treats the hand to destroy the internal board. 8. Do not clean your phone with strong chemicals, cleaning agents, or strong detergents. 9. If the phone or any of its components do not work properly, bring it to the nearest qualified maintenance mechanism. What is the precautions for using GSM mobile phones? 1. Use a mobile phone on the plane to interfere with the aircraft communication network, endanger the aircraft, please turn off the phone before boarding. 2. Turn off the phone in the gas station, chemical plant, oil depot and blasting. 3. When using your mobile phone, don't approach your heart pacemaker, hearing aid, and so on. 4. On driving, please use your mobile phone carefully to avoid affecting traffic safety. 5. Protect the phone from violent sun, rain. 6. Install an antenna or change antenna that does not meet the standard, contains damage to the mobile phone, and seriously affects the operational performance of the phone. Will the GSM digital phone will be sneaked in the send? A: No. Although radio waves can be listened and transmitted without affecting operator equipment. However, GSM digital phones have very strong security and confidentiality measures. First, it uses a method of assigning a temporary user identification code to the user to prevent user location from leaking. Second, the GSM digital cellular mobile phone system encrypts the wireless path, especially for all user information to prevent third-party persistence. Even if this signal is received by other radio receiving devices, it cannot be restored to the original.
