Tethering is when you use the internet connection of your mobile handset to allow another handset to access the internet. The most common way of doing this is using your device as a Mobile Hotspot. This allows your device to create a secure Wi-Fi network for other Wi-Fi enabled devices to connect to.
How Much Does It Cost?
If you have an applicable data bundle, data used by tethered handsets will come out of your bundle allowance. If you do not have an applicable bundle, data charges will apply for any data used by any connected handset, if your mobile handset is connected to the internet using the mobile network.
Where is Tethering Available?
Tethering is available in most countries, although there are still some operators and devices that do not support this feature.
Some networks do not allow tethering on BlackBerry OS (BBOS), which includes the Blackberry 9720.
How Do I Set Up A Mobile Hotspot?
Settings > Personal Hotspot > Change the Wi-Fi Password > Turn ON Personal Hotspot > Choose either Wi-Fi, Bluetooth or USB
You may also visit Apple Support
Settings > Mobile Hotspot and Tethering > Switch ON Mobile Hotspot > option More, configure the Hotspot details such as Password, Security Type and SSID name > Save
You may also visit Android Help
System Settings > Network and Connections > Mobile Hotspot select either Wi-Fi or Internet Tethering (USB or Bluetooth) > Configure Mobile Hotspot Settings > Save
** Tethering is blocked on some roaming networks for BBOS.
More information on Blackberry Support
Start > All Apps > Settings > Internet Sharing > Click the Toggle Switch to enable Tethering > Click Setup and configure Broadcast Name and Password > Tap the Checkmark to Save
You may also visit Microsoft Support