What if I’m not at my computer to restore my iPhone X?

Go to Settings > General > Reset and tap on Erase All Content & Settings.

How to erase your iPhone, iPad, or iPod touch

https://support.apple.com/en-ie/HT201274

No. See if you can borrow a friend's or relative's computer for this purpose. Alternatively, pay a visit to your local Apple Store or Apple Authorized Service Provider and they should be able to help you out.

Jimrbrownjr wrote:

My iPhone won’t turn on and it says to restore by plugging in to a computer. I don’t have my computer.

As stated you'll need to wait until you can get to a computer, there is no way around this.

Then ask family member or a friend with a computer for help.

Otherwise get yourself an appointment to Apple Retail Store where they can help you. Or bring it to nearest Authorised Service Provider where for a service fee they will sort you out.

That are your options.

Jimrbrownjr wrote:

What if I’m not at my computer to restore my iPhone X?

then you wait until you get back to your computer to restore your phone.

Jimrbrownjr wrote:

i want to restore my phone but I don’t have a computer. Is this possible?

no