I get default ring tone, when I assigned caller ID ring tones.

[Cause]

Number in the phone book is not the same as the received number.

The period of using the ring tone was expired.

[Solution]

When you get default ring tone, please refer to the follows:

- The Caller ID reads the phone numbers in 10 digit format only, (012-345-6789).  If displayed number is different by even just one digit by for example, area code, the assigned ring tone would not ring.

- If the caller ID ringtone was invalid, the device uses default ringtone for incoming call.