I’m trying to register network by using the automatic network registration: AT+COPS=0
this comand return always error :
And when using AT+CREG?
this command return +CREG: 0,3(registration denied)
please can anyone help me , i don’t know the cause of the problem.
It means pretty much what it says: the network has actively refused (denied; rejected; disallowed) the registration request.
So you need to contact your service provider to find out why they are refusing service to this device.
Has you credit or service contract expired or been terminated?
Are you trying to roam onto a network that doesn’t have an agreement with your provider?
Some networks will reject devices that they have not specifically approved.
Thank you for your response,
i try with an other service provider and i activate roaming service but i have the same behavior,
ps: i don’t have this behavior when i replace HL8548-G by HL6528-G.
Can you guide me to solve this issue
I contact my service provider and i’m waiting for their response,
I try to test +KSYNC command
AT+KSYNC=? and AT+KSYNC? return ERROR
Please let me know the cause.
thank you in advance
Verify that the SIM contacts are proper. AT+CPIN? will give you some information.
HL6528-G is 2G/GPRS module (Quad-band GSM/GPRS and GNSS. Dual SIM Dual Standby)
HL8548-G is 3G/HSPA module (Pentaband HSUPA/HSDPA, quad-band GSM/GPRS/EDGE and GNSS)
Do you have the right sim (usim) card for the 3G network? Does your telco support 3G (HSPA) in the area where you are?