I suspect this is a phishing scam to find out your personal info. Phone number was answered immediately by someone with a heavy accent purporting to be from Google. I hung up when he asked me to go to my computer to help him find out what had happened. The message I received is below.

New text message from (626) 703-5311
Inbox

(626) 703-5311 <12073702703.16267035311.vk5mmW9HCB@txt.voice.google.com>
8:51 PM (14 minutes ago)

to me
Google Voice
Dear User, Your email password has been changed from IP 102.11.200.255 at Turkey using IE. If this is not made by you, please report to 18448477378 immediately.
To respond to this text message, reply to this email or visit Google Voice.