For only Php200 a month, Sun Cellular is offering subscribers unlimited SMS within their network (with Sun Power Text Unlimited 200), probably the cheapest unli-text we’ve seen locally.
On top of the unli-text, Sun Cellular included 4 hours of Sun-to-Sun calls and additional 500 free SMS to all other networks.
To activate the promo, just text TU 200 to 247 on your Sun SIM. Promo ends on October 31, 2011.
Update: Sun currently offers a prepaid card at Php150 for unlimited Sun-to-Sun text for 30 days with 4 hours free Sun calls. This new Text Unlimited 200 variant is deductible from your Sun load and includes 500 SMS to other networks.
Though the Php150 Text Unlimited Prepaid card is technically cheaper, the Text Unlimited 200 is more reasonable since you get that 500 additional SMS to other networks.