Please be warned. I've been a longtime google voice user and for the past few months text messages from AT&T senders have been dropping silently at a very high

Please be warned. I've been a longtime google voice user and for the past few months text messages from AT&T senders have been dropping silently at a very high rate. This is a very bad problem as the sender thinks you have received the message. I've written to google about 10 times about this over the past couple of months and have gotten no reply and the problem continues to occur. Searches of their help site indicate that this is a medium-spread problem. Caveat Emptor.