What happens if you tap "No" is that the system setting is switched to "Always ask". If you try now to make a phone call, you will be prompted with an other popup to select a SIM card. You can do this by tapping on one of the items beneath the header.
However, I understand the confusion and I think the journey needs a UX refinement. ** Tags added: ota-1 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to dialer-app in Ubuntu. https://bugs.launchpad.net/bugs/1394669 Title: 'Switch to default SIM' dialog is confusing Status in Ubuntu UX bugs: Triaged Status in “dialer-app” package in Ubuntu: New Bug description: If I press 'No' on that dialog, there is no way for this dialog to appear again, even changing the setting in system-settings has no effect. 0. Clean flash device. 1. Start dialer 2. A dialog appears to select default sim 3. Tap on 'No' button 4. Go to system settings and select 'Ask me each time' for outgoing calls. What happens: The sim prompt dialog never appears, no matter I toggle that setting. ProblemType: Bug DistroRelease: Ubuntu RTM 14.09 Package: dialer-app 0.1+15.04.20141111~rtm-0ubuntu1 Uname: Linux 3.4.67 armv7l ApportVersion: 2.14.7-0ubuntu8 Architecture: armhf Date: Thu Nov 20 17:18:59 2014 InstallationDate: Installed on 2014-11-19 (0 days ago) InstallationMedia: Ubuntu Utopic Unicorn (development branch) - armhf (20141119-181707) SourcePackage: dialer-app UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-ux/+bug/1394669/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp

