Iphone4 SMS and address book problem high score ~

9 1 What do you mean? Who knows who uses it. It's very convenient, and it also allows you to install many third-party cracking software for free. The disadvantage is that the mobile phone system may be unstable and turn white apples or bricks. But one thing, the software itself is also upgrading, fixing some unstable bugs in the previous version.

In 9 1, the sim address book function can be completely imported and deleted, and various management functions can be realized.

There are many third-party softwares in the app store that need to be paid, and the itunes account should be bound with a bank card.

If you want to use these softwares for free to make your iphone more powerful, you need to jailbreak.

Jailbreak means that iphone can install cracked third-party software and free downloaded software in cydia and icy.

If there is a locked version of the machine (such as the American version), its communication function is limited at first, and it cannot be recognized except the designated operator (such as AT & amp； T contract service) other operators (such as China Mobile Unicom), that is to say, iphone can't realize communication function in China.

Cracking is to enable iphone to identify other sim cards after installing cracking software (such as Super Snow Yellow Snow), so as to realize communication.

Prison break and cracking are two concepts. Cracking is also called soft unlocking.

But jailbreaking is the premise of cracking.

What is the impact on the system before and after cracking?

A: In short, each has its own advantages and disadvantages, and it is up to you to decide according to the trade-off.

Advantages and disadvantages of jailbreaking or not

First, the advantages of not jailbreaking:

1. Save electricity.

2. The system is relatively stable.

3.3. The software downloaded and installed by Apple Store has strong compatibility.

4. The software downloaded and installed by Apple Store (ipa format) will not leave redundant system junk files after being deleted.

Disadvantages:

1. background is not supported. For example, if you have QQ, you can't surf the Internet.

2. System-level software, such as incoming calls, SMS showing the place of origin, SMS receipt, flash, etc. Without jailbreaking on the iphone, it will never be realized.

3. The system authority is very low. For example, we can't delete system programs, modify system files and settings, encrypt programs, send files via Bluetooth, use third-party input methods, etc ... and third-party software can't be realized. Why? Application developers want to put it on the App Store, and their works must also listen to Lao Qiao.

4. Unable to install the cracked program.

5. Personalized programs such as theme, icon and SMS ringtone cannot be changed.

6. You can't use your mobile phone to download files directly in the browser and manage files on your mobile phone.

Second, the advantages after prison break:

1. can support background operations.

2. The system has high authority and can optimize the system and modify the system files by itself. You can install more software with high system authority and realize more advanced functions! For example: sending files with other devices via Bluetooth, SMS receipt, call attribution, call answering vibration, file management, browser downloading plug-ins, flash plug-ins, content management, etc.

3. You can install cracked software.

4. You can change the theme, icon, SMS ringtone, etc. Create a personalized mobile phone.

5. You can flexibly manage the system or other files with the help of third-party file management software.

Recommendation: ifunbox, use iphone as a mobile hard disk (USB flash drive). Tip: Never use 9 1 mobile assistant.

Disadvantages:

1. It needs electricity. After jailbreaking, the system will always keep some processes in jailbreaking state. Depending on the number of installed system-level software (deb format), the power consumption speed will increase by about 10% ~20% after jailbreaking. Tip: Never install software in pxl format.

2. It may cause system instability. While we have high system authority, we are also in danger of system collapse. Can you understand this truth? It can be revised, but it cannot be guaranteed to be corrected forever. Therefore, it is better to have system-level software than to abuse it. If you don't understand the purpose, don't install it indiscriminately. 3. When the new mobile phone firmware version comes out, it can't be updated in time. Every new version of firmware will fix the jailbreak vulnerability of the previous version, making jailbreak invalid. Therefore, if you need to maintain the function after jailbreaking, you must wait until the new jailbreaking program is released before upgrading the corresponding mobile phone firmware version. 4. There are bugs in the jailbreak process, but it doesn't affect the use.

Third, * * * similarities.

Free or paid software downloaded from 1 The apple store can be installed without being affected. 2. It will not damage the hardware, and jailbreaking will not change the hardware on any mobile phone. For example, jailbreaking will not burn the motherboard like using pirated xp.

In addition, objectively speaking, it is easy to install all kinds of software on my mobile phone iPhone3gs after jailbreak, but I can't turn it off and charge it, so I can only turn it on, and the battery time becomes shorter, which is actually quite short.

Prison brake is a movie jailbreak, which also refers to cell phone iPhone jailbreak.

Even if I miss the days when I was copied and pasted upstairs, I feel very fulfilled, hehe.