1. Set phone to 2G signal.. 
2. Text GPRS ON to 211 (ignore nyo lang yung text ni smart) 
3. Text 3G ON to 211 (ignore nyo lang yung text ni smart) 
4. Text POWERAPP to 7577... I repeat sa 7577 nyo isend.. (Walang magrereply dito.. OK lang yun...) 
5. Text SET to 211 (Walang magrereply dito.. OK lang yun...) 
6. Reboot Phone 
7. Hintayin nyo magkonek sa 2G yung data.. 
8. Switch immediately to 4G setting..