I would think that it would work on the 8830. The 8100 I cannot say as I have no access to an 8100, and we don't have GSM in Fargo so I can't test if I had one. I will try and test the 8830 this week and get back to you. I will tell all of you that this setup is really inconsistent it seems like it works sometimes, and sometimes does not so you have to keep at it.