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Add note about removing battery to enter flash mode/USB download mode authored by gondolyr's avatar gondolyr
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Tips-&-Tricks.md
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......@@ -200,9 +200,9 @@ UPDATE: See detailed tutorial below.
To enable [ufw](https://en.wikipedia.org/wiki/Uncomplicated_Firewall) (**u**ncomplicated **f**ire**w**all), open terminal and enter `sudo ufw status` and if it's not yet enabled, enter `sudo ufw enable`. The default is usually all you need, but you have the options of adding additional rules. Use `sudo ufw disable` to disable the firewall. To call up a graphical interface inside the terminal, first install gufw and install x11-xserver-utils. Next type the following command: `DISPLAY=:0 xhost +` and hit enter, resulting in: `access control disabled, clients can connect from any host`.\
Now type: `DISPLAY=:0 GDK_BACKEND=x11 sudo gufw` and the graphical version will appear right in the terminal. Note that after you close the terminal, the app icon in the phone's app list will not be operational unless you repeat the above process, at least unless someone adapts it later.
### Flash Mode
### Flash Mode (USB Download Mode)
Flash mode is useful for [reflashing your Librem 5](https://developer.puri.sm/Librem5/Development_Environment/Phone/Troubleshooting/Reflashing_the_Phone.html) or for enabling [Jumpdrive](https://github.com/dreemurrs-embedded/Jumpdrive) to mount the internal storage as a USB disk.
Flash mode, or USB download mode, is useful for [reflashing your Librem 5](https://developer.puri.sm/Librem5/Development_Environment/Phone/Troubleshooting/Reflashing_the_Phone.html) or for enabling [Jumpdrive](https://github.com/dreemurrs-embedded/Jumpdrive) to mount the internal storage as a USB disk.
1. Ensure that the phone is powered off.
2. Turn off **all** Hardware-Kill-Switches.
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6. Reinsert the battery (red light is constantly on).
7. Release volume-up.
**Note**
From <https://forums.puri.sm/t/cant-use-l5-after-update/16245/229>:
> Technically, you don’t need to do the battery dance, but the instructions tell you to do so because it increases the chances of it working in some edge cases, like battery being flat, or SoC being stuck in some weird state. This helps because of the LED feedback you get when there’s no battery in - so you can match the LED output you see with the instructions and know that things are going well, there’s enough power available for phone to actually run etc. Without that, there’s no indication of progress, as the only feedback USB download mode gives that informs you it actually booted into USB download can only be seen over USB, so if you don’t see it on your PC you’re pretty much in the dark and figuring out why it’s not working is mostly trail-and-error. With these slightly more annoying instructions, we can at least weed some common failure cases out early
### IMEI
To find the IMEI of your Librem 5, go to `Settings` > `Mobile` > `Modem Details`.
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