I have already written a "how to" on using your Android mobile phone as a mobile hotspot, which can be found here.
Below is instruction on using Easy Tether Full on any Android phone. Easy Tether is just as great as Barnacle Wifi Tether, but instead requires the use of a USB cable to connect to the internet on another device. So, if Barnacle Wifi Tether just doesn't work for you, or if you prefer to connect with Easy Tether, follow the below instructions to try it out in full mode.
Below is instruction on using Easy Tether Full on any Android phone. Easy Tether is just as great as Barnacle Wifi Tether, but instead requires the use of a USB cable to connect to the internet on another device. So, if Barnacle Wifi Tether just doesn't work for you, or if you prefer to connect with Easy Tether, follow the below instructions to try it out in full mode.
Preparation:
1. Download easytether0.9.3.apk
2. Install and open Easy Tether app
3. Follow instruction as if installing app as normal, tapping "Next" on each screen
4. When prompted to install computer software, choose the option that says "I have already installed the PC software"
5. Then tap "Finish"
6. Tap on "Menu" button to access the "About" screen
7. The about screen has a 5-digit registration code, write down the registration code, then uninstall Easy Tether 0.9.3
Install full mode:
1. Download and install Easy Tether Lite from Google Play Store
2. Open Easy Tether app and follow instruction for installing PC software
3. Once that is done, tap on the option on the app's main screen which says "Activate EasyTether"
4. Then look for the text "Got a five-digit activation code?" and tap on the "Enter it" button below that text
5. Enter the 5-digit code you wrote down earlier into the text box and tap "Finish"
6. Your phone is now installed with a registered version of Easy Tether
Tips: If the link to download the old EasyTether0.9.3 app is broken, perform a google search for "easytether.v0.9.3" to find alternative downloads. At the time this was written, these instructions were confirmed to work with EasyTether v1.1.3. If this no longer works with whatever the newest version of Easy Tether is, then perform a google search for "easytether.v1.1.3" and download that app instead for the second part of the installation.