Welcome to Android Central! You need to be more specific First, which browser -- the Samsung Internet browser? Second -- what's the problem? Is it slow? Is it not bringing up web pages correctly (or at all)? Is it crashing and dumping you back to the homescreen?
The SGH-i727 is the Galaxy S II Skyrocket, which is NINE years old (in tech years, that's about 99

). So it's almost certain that the phone's browser (and the rest of the system) is woefully out of date, and can't access much of the web anyway. Get a newer phone.