Dust has gone inside my mobile screen and front camera. I don't know how it got there but I suspect that it has entered from the USB port. How can it be removed?
I think the safest approach is to take it to some phone repair place and have them help you with that, although that might or might not cost you a lot of money. If you would like to try it yourself, depends on which model of phone you have, you can look up information online for how to take apart and put back together a phone. This is a website that has lots of detailed step-by-step instruction on taking apart and fixing phones. https://www.ifixit.com/Teardown If you can find your phone on there, then you can decide if you want to take it to a repair shop or just open up your phone by yourself.