I have a Samsung Galaxy SIII LTE (I9305) and I have set up my wifi to connect to my network at work, however I require a username and password in order to access the internet as all our traffic runs through a proxy server. There appears to be no such functionality existing in the OS, so please let me know which app I can safely use (without rooting my phone) in order to input a proxy username and password so that I can access the interwebs. Thanks in advance.