Same problem here on Debian Wheezy 7.1 with network-manager 0.9.4.0-10, but I eventually found a dirty workaround:
The layout of the PIN dialog is defined in /usr/share/nm-applet/gsm-unlock.ui. If this file is renamed, whatever program spawns the dialog silently fails. Hence the bugging dialog will not appear, but the connection works nevertheless.
Same problem here on Debian Wheezy 7.1 with network-manager 0.9.4.0-10, but I eventually found a dirty workaround:
The layout of the PIN dialog is defined in /usr/share/ nm-applet/ gsm-unlock. ui. If this file is renamed, whatever program spawns the dialog silently fails. Hence the bugging dialog will not appear, but the connection works nevertheless.