Nokia has also released a patch for Nokia N70 which removes the ringtone problem faced by many users. Sometimes your phone might not ring or vibrate when a call is received. There are a few reasons why this might occur:

1. If you have deleted your ring tone file or changed your MMC card, the phone may not be able to find the ring tone file and therefore cannot play it. Please ensure that your selected ring tone file still exists on the phone or the MMC card.
 
2. Complex ring tones (MIDI, AAC, MP3 or WAV files) can sometimes take a long time to load and play. Occasionally when this happens the phone uses a default ring tone setting which may be missing. To ensure this default ring tone is present you can download this patch file and then transfer and install it on your phone. This patch is recommended even if you have not experienced any problem with the ring tone. If your phone shows a security notification when you are installing the file, please ignore it and continue with the installation.

This patch can be downloaded from the Nokia N70 Support Page.