Did write them a love letter but it went to blind eyes at a certain department.
Explaining everything to them in detail - maybe they don't want to enable the feature cause then they will have to pay someone royalty fees...
Still puzzled how CELL C can get the option to be enabled.
Read this
http://support.apple.com/kb/HT1970
Note: If you insert a new SIM or micro-SIM card into your iPhone or iPad, you'll need to download the carrier settings for the new carrier wirelessly. Carrier settings are available only for iPhone support carriers and
iPad partner carriers. If you're not using a partner carrier, you will need to set up the carrier's settings manually. Refer to your carrier for appropriate settings.
Every time I put a new micro-sim card automatically it asks me to download carrier settings...
The statement above in bold tells me that they are a partner - why can they not enable it and already they selling the iPhone(resellers) I am sure Apple won't have a problem to give them the method on how to active the setting.
http://support.apple.com/kb/TS2756 - Troubleshooting personal Hotspot
http://support.apple.com/kb/HT4517
Personal Hotspot requires a supporting hotspot tethering plan from your carrier. The maximum number of supported connections is five, but this number may vary depending on your carrier or iPhone model.