on my sprint tour i have certain tones for sms messages for certain contacts and a default tone for any other sms messages. my problem is once a contact with a custom sms tone sends me a text and their tone plays then when i get a voicemail or a text from someone without a custom tone it will play the custom tone from the last custom contact and not the default tone. the only way another tone plays is if another contact with a custom tone sends a text then their tone becomes the tone for everything. the original default tone never plays again please help