There are various different Software versions for this Series:
+
There are various different Software versions for this Series. some of them have different interfaces so not every config option is in the same place.
+
+
## Secret Menus
+
:::danger
+
none of these are officially documented by Mitel. These menus have a chance at bricking your device, or altering the config of the handset in an undesirable way. It can be very hard to reverse these changes so proceed at your OWN RISK.
+
:::
+
+
### Service Menu
+
+
#### How to access
+
1. open the main menu
+
2. type `***67#`
+
+
#### Function
+
exposes administrative options
+
:::warning
+
you can lock yourself out of the service menus. depending on your firmware you can reset the handset via the boot menu if this happens.
+
:::
+
+
### Internal Service menu
+
+
#### How to access
+
+
1. open the main menu
+
2. type `**888#`
+
+
#### Function
+
exposes internal administrative options
+
:::warning
+
you can lock yourself out of the service menus. depending on your firmware you can reset the handset via the boot menu if this happens.
+
:::
+
+
### Master reset
+
+
#### How to access
+
1. open the main menu
+
2. type `***778#`
+
3. type in `master` as Password
+
+
#### Function
+
master reset of the handset
+
:::warning
+
this will erase all data on the phone
+
:::
+
+
### Boot menu
+
+
#### How to access
+
1. shutdown your handset
+
2. start it
+
3. as soon as the led lights up press the volume up and the volume down button (or the upper and lower side button)
+
4. hold until the screen shows `S T O P !`
+
5. here you can use all other secret menus (be it with limited options)
