I could not find the correct place to ask about the QSC6270. Please let me know where the apropriate place to ask this is.
I am trying to find infromation about the QSC6270 chipset in order to debug a possible bug on my LGB470 phone. I have the phone plugged in via USB. I can send SMS messages using AT commands via the minicom terminal. However, attempting to list or read SMS messages from the phone/modem causes the modem to stop responding:
AT OK ATI Manufacturer: LG ELECTRONICS Model: LGB470 Revision: LGB470-QSC6270-V10c-JAN-11-2016-ATT-US 1 [JAN 11 2016 22:00:00] SVN: 01 IMEI: 359926084167819 +GCAP: +CGSM,+DS,+ES OK AT+CPMS? +CPMS: "ME",15,500,"ME",15,500,"SM",0,30 OK AT+CMGF=1 OK AT+CMGS="+12146168895" > Hello World. +CMGS: 169 OK AT+CMGL="ALL"
I get no response and can no longer communicate at all. Typing is not echoed back and if I turn local echoing on and attempt to send the AT command I get no response. The only way to get the modem to respond is by restarting the phone (unplugging and plugging back in the phone's USB, etc. does not help). The same thing happens after AT+CMGR commands.
Why does the modem stop responding after AT+CMGL and AT+CMGR commands? Any tips on how to debug? It was suggested that this may be a firmware bug.