"iPhone is disabled - connect to iTunes" error on my iPhone
[Edited by Moderator]
You can use a computer to reset your device, as described in this article -->
If you forgot your iPhone passcode, use your Mac or PC to reset it - Apple Support
Read the support article for full information. You can also watch the 5 min. 16 sec. Apple video "How to restore your iPhone if you forgot your passcode" at https://www.youtube.com/watch/7s8-zLG9ySQ
This will result in erasing the iPhone. You have no alternative. You can, however, restore it from a backup as described in this support article --> Restore your device - Apple Support Some items will restore automatically once you make sure you are signed into iCloud (if you were using iCloud to sync these services).
Here are resources if you are prompted for your username and password and have forgotten them:
If you forgot your Apple ID - Apple Support Note that typically this is an email address you use.
If you forgot your Apple ID password - Apple Support
If you do not have a computer, use the link Find Locations to find an Apple service location, or ask a friend if you can use theirs. This could be either a Mac, or a PC with iTunes. If your computer doesn't recognize your iPhone, iPad, or iPod, read this support article --> If your computer doesn't recognize your iPhone or iPad - Apple Support