Using MyTether 2.1.0

You must manually configure the entire connection with the following settings:

Custom > Wireless > Enter Manually >

Enter SSID

WPA-PSK / WPA2-PSK

Enter your WPA Key

IP Setting > Manual

IP ADDRESS 192.168.1.75
SUBNET MASK 255.255.255.0
DEFAULT ROUTER 192.168.1.1
PRIMARY DNS 8.8.8.8
SECONDARY DNS 0.0.0.0

MTU > Automatic

Proxy Server > Do Not Use

UPnP > Enable