Easily solve the problem of wifi disconnection after ipad 4.2.1 jailbreak

Thanks to the weiphone community hikarishj.
After using 3.2.2 for too long, I finally wanted to change it to 4.2.1. The result showed that WIFI would often fall offline after 4.2.1 had been jailbroken. It is said that it was set by Apple to save power, to make it easier for us to watch online TV, we must get rid of him.
After searching, I found the following method and shared it with my students. I personally haven't tried it yet. submit it to my blog first:
Apple's setting for automatic disconnection of wifi is 1800 seconds, so we only need to modify this number,
We recommend that you use ifile to modify the address of this system file, so that you can easily edit the plist file and query it to the 1800 location. Change the time unit you want to change to seconds and then restart it.
/Var/preferences/SystemConfiguration/com. apple. wifi. plist
Waiting for blog