As we all know, UA15 promo is just an unlitext to all network good for two days without a call but good news, UA15 also includes a call to smart, tnt and red numbers. But its call don’t have a definite duration that you can avail. Sometimes 2 minutes, 5minutes or 10 minutes. Just try coz sometimes, it’s hard to connect to call a number. To make a call, dial *6608+11 digits number of smart/sun/tnt/
Important reminder: Make sure before you make a call, your extra load balance must be below 5 pesos if you don’t want your extra load to be sacrificed because the network will eat up your load.
Thanks to gani777 of symbianize.com for sharing this hidden trick on the promo UA15.