Hello. I posted this long ago on the Hero forums and it was pretty widely used with much success. Same method applies to EVO (I have already done it).
1) Call sprint CS and get your 6 digit MSL
-Root users can download MSL Reader from the market for free and get this MSL code without calling Sprint.
2) On your keypad dial ##DATA# (##3282#)
3) Select "Edit Mode"
4) Type your MSL as the password and hit "OK"
5) Select Advanced
6) Change your "Slot Cycle Index" to the value of 1 (explination below)
7) Press the Menu button
8) Select "Commit Modifications"
9) wait for your phone to reboot
Slot Cycle Index (SCI) - You can tweak your Slot Cycle Index (SCI) to make your phone poll the tower more often. This makes your texts and phone calls come through quicker. This setting is a trade off between lag (most noticeable when receiving calls) and battery life. The default value on our phones is 2. Every step of 1 adds 1.28 seconds to the poll time, so at a value of 2 it is only polling every 5 seconds or so. If you lower this to 1, the phone polls every 2.5 seconds. This won't affect battery life much in areas of good coverage, but may impact it noticeably if you're in a poor reception area.
1) Call sprint CS and get your 6 digit MSL
-Root users can download MSL Reader from the market for free and get this MSL code without calling Sprint.
2) On your keypad dial ##DATA# (##3282#)
3) Select "Edit Mode"
4) Type your MSL as the password and hit "OK"
5) Select Advanced
6) Change your "Slot Cycle Index" to the value of 1 (explination below)
7) Press the Menu button
8) Select "Commit Modifications"
9) wait for your phone to reboot
Slot Cycle Index (SCI) - You can tweak your Slot Cycle Index (SCI) to make your phone poll the tower more often. This makes your texts and phone calls come through quicker. This setting is a trade off between lag (most noticeable when receiving calls) and battery life. The default value on our phones is 2. Every step of 1 adds 1.28 seconds to the poll time, so at a value of 2 it is only polling every 5 seconds or so. If you lower this to 1, the phone polls every 2.5 seconds. This won't affect battery life much in areas of good coverage, but may impact it noticeably if you're in a poor reception area.
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