What is the phone plug-in? A: The phone plug is in addition to the software program itself, the malicious developer or illegal manufacturers to implement the program re-packaged to include some harm the user's executable file, mainly reflected in: Automatic deductions / collect information about users / or other damage to the phone system of things. What is the secret button phones? A: dark button software means without the user's willingness to agree to place the subjective chargeback software. Generally has the following characteristics: 1 start the software after installation or after the beginning without any prompting charges deductions; 2 parts client immediately after installation will not chargeback, but delayed or irregular deductions, so that the user is difficult to detect; 3 charges prompted vague, misleading the user clicks the pay button; 4 tariff prompt pops up, so the menu software the design of no return / exit button, misleading charges to force users to click the button. The quality level of this kind ofcellular phone jammeris very high. Give to explain the "signature" What does it mean, why should the "signature" and so on. S60 3rd edition done in safety relatively large improvement in the system installation and operation of third-party software has more stringent requirements. Some cell phone software and hardware related to safety / security and other aspects of personal information, the operation was made special restrictions (such as auto-start with phone boot is one of the functions are limited). Applications should implement these "special restrictions" of the functions must be "signed." That is to someone to be responsible for the safety of this operation! Without any sign of the program can not be installed to run. Signature (sign): that is, the specific field of application-specific tag information is written to indicate that the software has been reviewed by the signatories. Signer is responsible for the security of the software. One signature and broadly divided into three types. The customer has the high requirement of the quality level ofmobile phone jammer. That Symbian (Symbian) cell phone operating system officially signed. Safety certification through the Symbian software will be Symbian Signed. This software has the highest security level. Can be properly installed on the phone / run / software and can achieve all functions needed software from Symbian Signed and Symbian official dealing with the author directly, based on a number of reasons, not all the authors of the software have the ability to receive this certification. Software authors release software when the software is signed. Such software can be installed on the phone to run (may encounter a security warning, you can skip). But those who can not be achieved "by special restrictions," the function. If the software does not involve such a function, then the software author also entirely possible his signature on the line. Another possibility is that although there are certain parts of the software functions are "to be special restrictions," the range, but not the main function. Software authors can release a "Author Signature Edition", this version can use most of the functions normally, but will lose some specific functions. Such as "call" software had this version, almost all features are available, but can not boot from the start. The quality level ofcell phone jammerhas several classes. Strictly speaking this should be a "developer signature." Because Symbian for software developers to provide a "development certificate", originally intended to allow software developers for software testing purposes. The "Development Certificate" is used as a test machine with the IMEI code linked. With this software can only be signed by a certificate corresponding to the IMEI code used on the machine, can not be used for other machines. Our so-called "self-signed" The fact is the use of this approach, it means you say you are developing software, you provide your test machine's IMEI code, Symbian issued to you a "development certificate", you use the certificate signing you "Testing the software." You own your own "development activities" responsible. That's all. In addition, the development of self-issued certificate is valid for six months from the date, but the validity of the certificate signed in good time to use the program is no limit. The instruction will indicate the quality level ofcell phone jammer. So now friends with the third edition of the N machine go to the software without the signature of the certificate is not installed, then, but there are no sign of the software, then see whether the software they need the signature. Many of my friends in the process of installing S60 3rd time a "authorization failed" or "certificate error" and so on. "Authorization failed" or "certificate error" Analysis and solutions. The quality level ofcell phone jammerhas the specific stipulation.