I called back to this number and there was a message "The number you diled is not in servise"

They called my home about receiving a phone card with a certain amount of minutes free as a reward for my paying my phone bill on time. When I asked what company the man worked for he basically told me "the company you're with" or something similar. He then transferred me to another person who proceded to verify my information telling me my phone number and address and before I confirmed more I then asked him what company he worked for. He said nothing and a second later I was transferred to the first guy who told me "remember this card is free, bla bla bla..." I said ok and he patched me through to the other guy and I hung up. I don't know what other information they would have wanted to get from me but it sounded and felt like a scam of some sort.

I picked up the phone, there was no answer

called at 10:22 am   did not pick up and they left no message.
This area code is for numbers in the Brownsville, McAllen, Laredo and South Padre Island, Texas

I did not pick up and they left no msg.