Text Wise is a prepaid service in the Philippines that offers discounted international text messaging from any local mobile phone. It is sold of PhP100 with PhP100 credit. Each international sms is charged PhP5. It is basically an sms forwarding service.
Smart/TNT users forward sms for abroad to access number 378 and costs PhP2.50 charged to your Smart/TNT postpaid/prepaid account. Sun and Globe users forward sms for abroad to access number 0922-7042198 and costs PhP1 charged to your Sun or Globe prepaid/postpaid account.
So far, this service works. I was able to send sms to friends abroad. My phone number appears as the sender so they were able to identify me as the sender and was able to directly reply to my sms.
This is a good alternative to paying overpriced PhP9 to PhP15 international sms from Globe, Smart and Sun.