✔ 最佳答案
1. make sure you computer USB is work
2. check USB version, normally is 2.0
3. when you want to connect to computer, your phone needs to be switched on.
4. If you computer can dedect but it can't be used, then you have to install the software ( the CD should be provided by phone)
5. If you ensure the aboves are right, then your computer or phone have problem, buy a new one!