I accidentaly sent a confidental message to an incorrect contact. Fortunately, I could react in time, and I turned off my phone before it could be sent.
I opened my google hangout from the web, and I see that the message was not sent. (It was a big picture, whose upload was broken by the poweroff.)
However, now if I turn my phone on, the message will be sent.
I believe, my only way to delete the message, if
- I ban the phone from my home wifi,
- I remove the SIM card from it,
- I turn on the phone,
- I uninstall google hangouts,
- Re-enable my home wifi,
- Reinstall google hangouts.
However, doing these is problematic.
Does a quicker way exist for that?