Thank you all for your kind advice! I appreciate it.
Follow up: I took the advice of a member here and looked into Dtac long distance, who also happens to be my cellphone provider, As it turns out , Dtac long distance to the US is between 1-2.5 baht per minute. so sor less than what I paid for Skype I get more minutes than I could ever use, for the few times I call to the US. to communicate with friends and family I use FB messenger. I realize that I will not be able to get text codes from banks and gov. but the workaround to that is that I have my daughter's tell # on file with them and when a text code is nessacery, they send it to my daughter, and she texts it to me.