Use caution when modifying system configurations such as usb_modeswitch. Consider creating a backup before continuing.
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Don't worry about asking! Even if it's not directly incredibox related to usb_modeswitch or pppwidget, I'm always happy to help with my experience in this area. The E3131 situation sounds unpleasant, so let's see what we can figure out.

I understand your frustration about the unusual 3G connection problem on your car's bitlife audio device. It sounds like you've got a lot of troubleshooting done, and I appreciate the insight you provided.

Thank you for sharing your interesting fnaf find! It's great to see you contributing to the community with your technical knowledge.