How to change cover photo with an iphone?

I wanna change my cover photo on facebook with my iphone4s cuz its my only internet source right now so please help

If you have a computer in your house you can share your iPhone's internet by doing:
Settings-General-Cellular-Personal Hotspot
then activate it and set your password, you can choose from sharing via USB, bluetooth or Wi-Fi.

OR

You can go to Facebook in your iPhone's browser and choose to disable mobile view and just change it like you would on the computer.

I have iphone 4!

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