How to download and upgrade Firmware EC20

I upgrade failed,the devices i use now are EC20CEHDLG-128-SNNS and EC20CEEILG-128 ,what firmware version should i use?

Dear herbert,

Would you please send me the firmware for EC20CQDR02A05E2G.
ISP are using USSD and SMS to request profile, a newer firmware should help.

Thank you so much

I didn’t find the firmware of this model, please check again

AT+QGMR

[quote=“herbert.pan-Q, post:23, topic:15683”]
QGMR
[/quote] Hello Herbert, Thanks for replying,
I cannot access the serial port yet only the qmi port.
the result I got is as follow:
Hardware | manufacturer: Quectel
| model: EC20
| firmware revision: EC20CQDR02A05E2G 1 [Apr 18 2016 15:30:19]
| h/w revision: 30000
| supported: gsm-umts, lte
| current: gsm-umts, lte
| equipment id: 868323021251704

Thanks again.

I have sent the latest firmware and Qflash to your email,pls check