Wifi Problem, often reconnects, while other devices no. If connected, sometimes no internet access

May i know how can i solve my android problem? i have a Huawei Honor 3C 4G, however its wifi sometimes connects and disconnects very often. Other than that, when it's connected it sometimes doesn't have the internet access while my other devices and PC have internet access. I tried quite many things, change back and forth the wpa_supplicant at system/ bin, etc/ wifi. Doesnt work too. Hope some experts to help, it's really annoying. MY Android OS is 4.4.2