[HOWTO]Change to EVRC-B(Improve voice quality)

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This is my first how to here so I know it will sucks but oh well lol.

I saw someone post on general forums about voice quality. For what reason this isn't set to default i don't know.

What this does is enables and changes your Voice codec(unless its called something else) to EVRC-B.

Requirements: Need your MSL #

To get your MSL # you can either call sprint and play dumb(I say i need to reprogram my phone) or since we have root download MSL Reader off the market.

Step 1: Once you have the MSL # go to you dial pad and press ##3282#.
Step 2: You will get a window that says EPST, hit the Edit Mode. This will prompt you for your password. Type in your MSL number there and hit OK.
Step 3: Now your are in the EPST, Go to the Advanced menu.
Step 4: Scroll down till you see Vocoder. Enable this if it not by pressing on it and slecting enable.
Step 5: Below Vocoder is the EVRC-B, do the same thing if it is not enabled.
Step 6:Next setting is the Home Orig and Roam Orig. You want to change these to EVRC-B.
Step 7: Press your menu button, Commit Modifications will appear. Press it to save the changes. This will automatically reboot your phone.

Once it is back up, people should notice a better call quality from you.




Written pretty ****ty huh? lol

I've heard not all of the towers use all of the codecs.. but I'd think that wouldn't be a problem unless roaming or in rural areas.

Sent from my Nexus S 4G using XDA Premium App

This has been posted for weeks...just sayin.

Already in the stickied FAQ at the top of this forum. You should request this be deleted.

Dont mind all the other ignorants thanks for your help youve helped me thanks again

Originally Posted by southern87

This is my first how to here so I know it will sucks but oh well lol.

I saw someone post on general forums about voice quality. For what reason this isn't set to default i don't know.

What this does is enables and changes your Voice codec(unless its called something else) to EVRC-B.

Requirements: Need your MSL #

To get your MSL # you can either call sprint and play dumb(I say i need to reprogram my phone) or since we have root download MSL Reader off the market.

Step 1: Once you have the MSL # go to you dial pad and press ##3282#.
Step 2: You will get a window that says EPST, hit the Edit Mode. This will prompt you for your password. Type in your MSL number there and hit OK.
Step 3: Now your are in the EPST, Go to the Advanced menu.
Step 4: Scroll down till you see Vocoder. Enable this if it not by pressing on it and slecting enable.
Step 5: Below Vocoder is the EVRC-B, do the same thing if it is not enabled.
Step 6:Next setting is the Home Orig and Roam Orig. You want to change these to EVRC-B.
Step 7: Press your menu button, Commit Modifications will appear. Press it to save the changes. This will automatically reboot your phone.

Once it is back up, people should notice a better call quality from you.




Written pretty ****ty huh? lol

EDIT: I got it to work

I did this on my EVO 4G... I don't think it made any difference whatsoever.

Tried this on Synergy's latest nightly. It didn't automatically reboot the phone, but I lost signal completely. I'm manually rebooting now, I'm praying that it works properly.

What are the default values, in case I need to change it back?

Have tried this before and completely lost signal. YMMV.

I am trying to figure out the completely unnecessary use of profanity at the end of your post though. Try to have some class when posting in a forum read by all age groups. Read the Forum Rules regarding use of language which may be offensive to others.

I ended up booting just fine, got my signal back as well. I guess Synergy just wasn't interested in getting rebooted :P

I'll see if it works, it's about 4 in the morning for me, so I can't really call anyone.