how to bring up personal hotspot on iOs 5

At the time we bought an iPhone usually at no settings menu called personal hotspot. What causes it? That is because we have not filled our APN. The APN is Access Point Name which functions to connect hp with the operator to connect the internet.
following steps to create a personal hotspot:
1.Open settings and click "general"

2. Then, click "cellular". Make sure your cellular is on.

 3. Next, click the "cellular data network"

 4. Then see several options. Then see several options. Enter the APN of your operator in the "Cellular Data" option along with the username and password. Here I use 3 as the APN.
APN: 3
Username: 3data
Password: 3data

 5. Do not forget to enter the APN with the same username and password on the "internet tethering"

6. Finally back to setting and see the "personal hotspot"