OptConnect DEJAVOO Z9 Install Manuals page 11

On the back panel slide the switch to the right to unlock the panel.
Remove panel and battery.
Insert SIM card in lower left slot.
Power up the terminal by pressing and holding the small rectangle
button on the right side of the terminal for 2-4 seconds then release.
After turning the terminal on you will see the following message.
"SIM card Info
New SIM card detected:
Card 1:unknown"
Tap on Close
Tap Settings
Setting password 9876
Tap More
1 0 .
PAX A920 SETUP
STEP ONE
Replace back cover.
On back panel slide the switch to the left to lock the panel.
STEP TWO
STEP THREE
Tap Cellular Networks
Under Cellular Networks
Turn on Data enabled
Turn on Data roaming
Under preferred network type select 4G/3G/2G (auto)
Use preferred APN off
Tap on Access Point Names
Tap on APN
Tap the + to edit APN
If any information is currently listed delete
existing APN
Tap Name and enter "att hspa+"
Tap OK