I am running MacOS Mountain Lion. I have borrowed a Huawei Mobile Broadband USB modem (model E182E) from a friend to check out how well wireless internet would work. I was not able to get it to work, which is not the problem I am asking about. 

THe problem is now my WiFi connection is slow. I have unplugged the modem, and removed the Mobile Partner application. I am connecting to the internet via WiFi I've been using before. It is annoyingly slow. I am loading the same pages on an iPhone 4 quicker than on my MacBook Air.

How can I remove all traces of Huawei's software from my computer? I mean all drivers and extensions and anything else it may have gotten its dirty little paws on. I would like my Mac to work at its normal speed again.