Ipone4s version 6. 1.2, it takes about 20 seconds for the mobile phone card to send a text message after jailbreak, and there is no response when pressing any key during the period.

Apple recently issued a warning document to inform users that jailbreaking operation will not only make the mobile phone no longer enjoy any warranty service, but also bring the following problems:

1. Stability: devices often crash, applications on iOS devices will flash back, and data contained in the applications will be lost.

2. Security vulnerabilities: The jailbroken device is easily used by third-party applications, and the user's personal information is threatened at any time, which is in danger of being stolen and vulnerable to viruses.

3. Endurance: After being fully charged, the battery life of the jailbreak equipment will be shortened if it is not optimized.

4. Data loss: audio will be lost during the call, data connection will become slow or unstable, and positioning data will be delayed or wrong.

5. Service interruption: Voicemail, weather, stock and other services will be interrupted due to device jailbreak.

6. Impact update: After jailbreaking, it will cause irreparable damage to the iOS device, and the update failed.

It is not recommended to jailbreak IPhone version 6.0 or above, otherwise frequent Kaka and flashback will easily occur.

It is recommended to return to the factory condition.