Do I have to turn off my voicemail to use Google Voic,e without getting a sim error?

dustspot

Member
Feb 18, 2015
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Google voice on straight talk with ATT SIM Error

I am trying to install google voice on my ATT sim straight talk Galaxy s5. I type in the required *004*1yourgvoicenumber# and it says mmi code started.
Then, it says couldn't get server response. What am I doing wrong?

Do I have to have straight talk turn off their voicemail option on my phone? Supposedly google voice works with the att SIM on straight talk.