Set up voicemails
Ensure incoming is ringing properly
Landline - calls both of you.
Calls M on the web app.
Calls you on mobile
If no-one answers, will go to Voicemail (then available for listening in Conversations tab).
You can warm or cold transfer to her.
Mobile:
Can SMS in and out - all will see everything.
Anyone calling IN on this number - will be forwarded to your mobile app.
Get M into the web browser.
Test calling Landline.
Ensure her web app and your mobile app ring.
Maybe test/ ensure you can transfer.
Ensure it goes to voicemail.
Test calling in on Mobile - ensure your mobile app rings.
Ensure it goes to voicemail.