For modem:
Kung may modem ka katulad ng b315s-936 o e3372, kailangan mo ng custom firmware. Google mo: model ng modem mo + tapos custom firmware.
May mga modem din na built-in na yung band/frequency change option.
Kailangan LTE supported modem, at kailangan supported ang Smart/Tnt/Sun band frequency na b1(2100mhz), b3(1800mhz),
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For phone:
May mga phone na may built-in na yung frequency change. Google mo na lang kung meron sa yo.
Kung Mediatek based ang phone mo (search mo sa wiki listahan)
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Download ka ng MTK engineering sa Google play. Follow mo instructions sa yôutubê:
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Sa snapdragon based phone. Download mo yung LTE Discovery at Network Signal Guru sa playstore. Rooted kailangan.
Pero google mo na rin baka may built in na yun phone mo.