Q-Tel Qatar APN Settings for HTC Desire 816

Open App Drawer and go to Settings Mobile network settings Access point names

Press ➕ button on top right corner.

Enter name: Q-Tel
APN: web.qtel
Proxy:
Port:
Username:
Password:
Server:
MMSC:
MMS Proxy:
MMS Port:
MCC: (keep the default value set by phone)
MNC: (keep the default value set by phone)
Authentication type:
APN type: default

Keep default values for all blank fields shown above.

Press menu button (top right) and select Save. Done.