Retired Senior with T401g Ringtone Problems

I'm having trouble getting ring tones on my T401g and on incoming calls I have no ring tone and it come up except or reject the caller. I can't get it back to the way it was. I can't buy any ring tones. This started over night.
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Hi,

Thanks for your question. It's hard to guess what it could be. Before you call Net10's tech support please take a look at your incoming call sound setting to make sure everything's okay. You want to check if you can use the ringtones that already come with your phone.

From your home screen select:

Menu -> Settings (the icon with a gear and wrench) -> Sound Settings -> Incoming Call

This should bring you to the incoming call sound settings as shown in the picture. Make sure that the volume is set to a number between 5 and 7, with 7 being the loudest. In the past I have accidentally set the volume down to 1 while fiddling with the phone.

Hope this helps. If that's not the problem, then you can try tech support.

Thanks.