Just a heads up if you decide to do this, enabling tethering like this will impact your visual voicemail functionality. I (and others) would not see visual voicemail notifications until a power cycle of the iPhone.
I don't think you read the article so I'll help you out. Here is how to fix the visual voicemail issue, right in the last paragraph:
"Worth noting is that some users have experienced trouble with their visual voicemail following this procedure. If you do have trouble accessing that feature, simply navigate to Settings → General → Network → Cellular Data Network and within the Visual Voicemail section add “acds.voicemail” into the APN field. Once that is done, you will be able to once again use your visual voicemail."
"Worth noting is that some users have experienced trouble with their visual voicemail following this procedure. If you do have trouble accessing that feature, simply navigate to Settings → General → Network → Cellular Data Network and within the Visual Voicemail section add “acds.voicemail” into the APN field. Once that is done, you will be able to once again use your visual voicemail."