nadelete ang message center. hanapin mo lang yung message settings mo, kadalasan nandun yan tapos enter the appropriate message center number:
List of SMSCs in the Philippines
Globe Philippines
+6391702
+6391703
+6391704
+6391708
+6391709
+639170000017
+639170000020
+639170000118
+639170000130 (globe only. not for TM)
+639710000247 (also for TM)
+639710000240 (also for TM)
Islacom Philippines
+639150200003
Smart Philippines
+639180000101
+639180000115Gold)
+639198961000
Sun Cellular
+639220001501
Note: The source po nyan ay sa kabilang forum, but I'm not promoting it ha, it just so happen na yan ang lumabas after na click ko ang "I'm feeling lucky" button ni google chrome.