Check what type of encryption it is.

1, cmcc, cmcc-edu, preferably Chang Wireless, which supports free Internet access, you must download the app application;

2, if it is WEP, use your computer to crack it directly , search for "wep crack under windows", or use the most rubbish card king to get it usually in less than ten minutes, check it out on Taobao (mobile phones are also available, but computers have faster algorithms.

The ones that can crack WEP are: BT3, BT4, BEINI, CDLINUX can be cracked.

3. If it is wpa, wpa2. Card King can also be cracked. It is mainly a matter of time to crack the password-locked network. Hours are very common. If you want to crack an Android phone, you can try Wifi Crack Master, which also uses the exhaustive method. That is to say, if you don’t try to guess the password repeatedly, you will be lucky if you can crack it in one night (the phone is configured well). The better.) In addition, you can also try Master Key. Although there are only fifteen commonly used password guesses, if you are in a big city, you can see many that support wireless for free, but it is not very useful in second-tier cities.

4. By the way, China Telecom and McDonald's all have limited-time trial Internet access. You can just register with your mobile phone, so I won't go into details.