What if Cydia can't open the iphone? Cydia can't get into the solution.

Method One, modify the DNS address on the IPhone

1. Access the "Wireless LAN" in the iphone "settings" to see what happens.

2. If we use a wireless with an "exclamation mark" to represent a network problem, as shown in the figure.

3. If so, we click on it to enter, and then the following figure shows.

4. Now I enter DNS in DNS, we can enter 114.114.114.114 or 8.8.8.8 and then return to the wireless page to see if it is good, if not not to change a network to see.

5. Then open the Cydia to see if there is any effect.

method Two, turn off wireless, use mobile network

1. We can try to go down to the top of the notice, and then turn off the wireless to try to see.

method Three, shutdown and then boot

1. It is also possible that the mobile phone problem we restart the phone to try again, if it is still not possible to change the time period to try.