I'd only recommend a hair dryer or heat gun as anything else would probably risk injury, or even worse, damaging your phone! Maybe ask someone if you can borrow their hair dryer for half an hour?
I used to have a slick wraps skin on my previous phone and it's pretty important to have a heat source to get the curved edges right and to help the adhesive to stick properly. Definitely don't try applying it until you can sort something out..