BASIC OPERATIONS
The device is registered.
If the device returns:
+CREG: 0,2
The device is in a network searching state.
Verify that Device Detects a Valid SIM Card
If your device uses a SIM card, use the query SIM status command to verify if the device detects the SIM card. To
do this, enter:
AT#QSS?
If the device detects that SIM card, it responds with one of the following:
Response
Description
#QSS: 2, 1
SIM inserted
#QSS: 2, 2
SIM inserted and PIN unlocked.
#QSS: 2, 3
SIM inserted and ready.
If your device does not reply with one of those responses, verify that the SIM card is properly inserted.
When your device fails to connect
Work through the steps below until your device connects.
1.
Wait 30 seconds and try again.
2.
Wait 1 minute and try again.
3.
Wait 2 minutes and try again.
4.
Wait 8 minutes and try again.
5.
Make one attempt every 15 minutes for an hour.
6.
Make one attempt every 90 minutes.
When a call drops
If a connected call drops for any reason:
■
Wait 30 seconds and restart the sequence again.
Reading, Writing, and Deleting Messages
Reading Text Messages
To read a text message in text mode:
1.
Put the device in text mode.
Enter: AT+CMGF=1
2.
Read message.
QuickCarrier
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USB-D MTD-H5 User Guide
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