gist/callforwarding/README.md

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# Call forwarding, relevant commands edition
*This is widely documented around the internet, but everything has a lot
of details irrelevant to my case of two phones and it's always effort to
cherry-pick the relevant parts. This file may be unintentionally Finland
specific.*
1. Open dialer
2. Enter command. +358 is Finnish international format, remove leading 0 from
phone number's local format. (040… → +3584…)
3. Call there
## Commands
* `##002#` - Remove all call forwards
* `**61*+358…**30#` - forward if call is not answered in 30 seconds
* 30 may be replaced with multiples of 5 between 5 and 30.
* `**62*+358…#` - forward if phone is not connected to network.
* `**67*+358…#` - forward if phone is on another call.
Copy-paste template for text editor:
```
**61*+358…**30#
**62*+358…#
**67*+358…#
```
## Status check
* `*#002#` - Supposedly status for all forwards. Will respond with everything
has failed.
* `*#61#` - Status for forward while not answered. Doesn't show the amount of seconds as
that would likely make life too easy?
* `*#62#` - Status for forward when not connected to network.
* `*#67#` - Status for when being in other calls.
## GUI
* Apple: has no proper GUI for the cases above, only on/off toggle on forwarding
every call. https://support.apple.com/guide/iphone/iphe9bdd027a/ios
* Android: likely OEM-dependent and I don't have an Android with a SIM.
* SailfishOS: Settings → Applications → Phone → Call forwarding. Case forward when
not answered in X time has no option how long to wait and I am not going to try
whether it forwards in 5 or 30 seconds.