02-28-2025, 07:03 AM
Update:
I was able to recover my modem without access to the test points.
I want to leave this information for everyone that finds this thread looking for EDL mode.
You can find a manual I used at "https://themodemdistro.com/docs" in the section "Really really emergency recovery with Quectel's Fastboot bootloader", also some information is missing for people that are not to deep into programming.
short version of link mentioned above
disclaimer everything on your own risk!
---
Since the Internet tends to change I will write down the steps here:
- You need some distro on your pinephone that allows ssh over usb, so you can connect to it, since you remove the wifi antenna with the mid-frame assembly.
- You also need a ttl adapter 1.8v (important or you can damage your modem)
---
on Phone:
- disable modem via hardware switch
- connect to your phone via ssh and stop modem services (systemctl stop ModemManager ; systemctl stop eg25-manager)
- enable modem via hardware switch
on PC:
- the doc gives an example script which you have to modify it like this to enter fastboot mode on your modem, also change to the right ttyUSB Port:
#!/bin/sh
echo -e "\003fastboot\r" > /dev/ttyUSB0
- run script with "watch -n0.1 ./serialcmd.sh" runs the script ever 0.1 second
- connect the tx pin of your ttl adapter to the rx pin of the modem (holding the pin onto the pad should be enough), the adapter needs a common ground. If you use the ports next to each other for USB-C and the ttl adapter you should have it otherwise connect the ground pin of your adapter to the ground plane of the phone.
- start modem service (systemctl start eg25-manager)
after this the modem should show up in fastboot mode and you can flash it.
If its not showing up repeat (mine constantly boot looped but depending on the bricked state you may have to stop the services and turn the modem hard off via the switch between attempts.)
good luck everyone
I was able to recover my modem without access to the test points.
I want to leave this information for everyone that finds this thread looking for EDL mode.
You can find a manual I used at "https://themodemdistro.com/docs" in the section "Really really emergency recovery with Quectel's Fastboot bootloader", also some information is missing for people that are not to deep into programming.
short version of link mentioned above
disclaimer everything on your own risk!
---
Since the Internet tends to change I will write down the steps here:
- You need some distro on your pinephone that allows ssh over usb, so you can connect to it, since you remove the wifi antenna with the mid-frame assembly.
- You also need a ttl adapter 1.8v (important or you can damage your modem)
---
on Phone:
- disable modem via hardware switch
- connect to your phone via ssh and stop modem services (systemctl stop ModemManager ; systemctl stop eg25-manager)
- enable modem via hardware switch
on PC:
- the doc gives an example script which you have to modify it like this to enter fastboot mode on your modem, also change to the right ttyUSB Port:
#!/bin/sh
echo -e "\003fastboot\r" > /dev/ttyUSB0
- run script with "watch -n0.1 ./serialcmd.sh" runs the script ever 0.1 second
- connect the tx pin of your ttl adapter to the rx pin of the modem (holding the pin onto the pad should be enough), the adapter needs a common ground. If you use the ports next to each other for USB-C and the ttl adapter you should have it otherwise connect the ground pin of your adapter to the ground plane of the phone.
- start modem service (systemctl start eg25-manager)
after this the modem should show up in fastboot mode and you can flash it.
If its not showing up repeat (mine constantly boot looped but depending on the bricked state you may have to stop the services and turn the modem hard off via the switch between attempts.)
good luck everyone
