Modem HL8548 new firmware (5.5.26.0) connection problems

[jyijyi]

You can see here

HL8548 CGATT=1 results in Unspecified GPRS error until CGATT=1 is called multiple times in a row

Hi robvice, I cannot help if a hardware issue. Regarding “AT+COPS=? +CME ERROR: no network service” issue, please try to restore all the NV default value including customer settings by AT+NVRST=2(a reset will happen automatically) to see if it can help. Or try to upgrade FW again.

Btw, how is your test result of linux dial up?