Hi,1.We think it may be caused by the interference of the metal case on the wifi. Please remove the shell to test whether the wifi is stable. 2.You can use a USB Doggle to solve this problem. 3.Please tell us what operating system you are using and we will try to help you debug the X735 script. 4.please email to:support@geekworm.com; and please tell us your order NO.