diff --git a/android/increase-volume.md b/android/increase-volume.md
new file mode 100644
index 0000000..fe69645
--- /dev/null
+++ b/android/increase-volume.md
@@ -0,0 +1,5 @@
+# increase volume
+
+edit `/system/vendor/etc/mixer_paths*.xml`
+
+for volume steps, edit `/system/build.prop`
diff --git a/linux/router/dnsmasq.md b/linux/router/dnsmasq.md
index 177a5f1..99581f5 100644
--- a/linux/router/dnsmasq.md
+++ b/linux/router/dnsmasq.md
@@ -83,3 +83,14 @@ then take the interface down and bring it back up with:
 ifdown lan0
 ifup lan0
 ```
+
+## Configure NetworkManager
+
+If you want the router itself to also send DNS requests through dnsmasq, you need to configure NetworkManager to use dnsmasq. Edit the file `/etc/NetworkManager/NetworkManager.conf`, and under the header `[main]` add the line:
+```
+dns=dnsmasq
+```
+then restart NetworkManager to make the changes take effect:
+```
+systemctl restart NetworkManager
+```