Originally Posted by stroths

I found the instructions below on another website. I tried it on my 6800 and it worked like a charm. The time it took for my phone to start ringing was cut in half (~2 seconds). If you don't have your MSL, you will have to try to get it out of Sprint customer service.

FIX THE SLOW RINGER

To do this, you will need your MSL, which only Sprint (or your provider) can provide you. Open up the phone app and dial ##778# (PST). You will be asked to enter your MSL. Enter it, and you will be brought into the provisioning of your phone. From the top left, select Modem Settings. On this page, your Slot Cycle Index (SCI) is how often your phone polls the tower for incoming calls, etc. This value is 1.28 seconds multiplied by 2^value (i.e 0=1.28 secs, 1=2.56secs) with 0 fastest, 7 slowest. The default is 2, but lowering it to 1 hasn't noticeably affected my battery life, and roughly 2.5 second (SCI 1) response time is far more reasonable than roughly 5 seconds (SCI 2)



Change ringtone/vibrate/LED flash characteristics

If you would like more control over how your device rings/vibrates/flashes its LEDs on events, you can can change the Script values of these events. For example, for an incoming call performing 'activate device, play ringtone, wait 3 seconds, repeat':

HKCU\ControlPanel\Sounds\RingTone0\Script = "apw3r" (REG_SZ string, no quotes)

For performing 'active device, set volume to 33%, play ringtone, set volume to 67%, play ringtone, set volume to 100%, play ringtone (no repeat)':

HKCU\ControlPanel\Sounds\RingTone0\Script = "ac33pc67pc100p" (REG_SZ string, no quotes)

The following are the full codes available to you. Please note that all the codes are executed simultaneously except after a ringtone play / wait code. E.g. 'v1p' will vibrate and play at the same time, while vibrating for 1 second. But 'pv1' will play the ringtone through all the way first, then start vibrating for 1 second.

a = activate device
cN = set volume to N in percentage max volume
fN = flash notification LED for N seconds
p = play ringtone. Note that this will play the ringtone all the way through before continuing with the next code.
r = repeat. Note that this should be the last code in your Script string, if used at all.
vN = vibrate for N seconds
wN = wait for N seconds. Note that the device will wait this long before continuing with the next code.

NOTE: I tried this on my 6800 and changed the v0 to v1 and now it doesn't have just one long vibrate. v0 sets it to vibrate always.