Why doesn't my wireless give access wifi to other devces?

yo yo yiggiti yo

Honorable
Jan 16, 2014
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10,510
My current location is pakistan. using a wireless device named PTCL Evo 3g Nitro cloud. The problem I am facing is that when ever i am plugging this device in my desktop, the wifi loses its existance. 2nd- I cant access default ip/ipv4 i.e. 192.168.1.1 when its on pc. Wifi works ok when its not connected through usb. If u cant solve this tell me how to change default gateway, subnet mask.
I have already tried it in lan connection but there is none of these.