PJ area. Sec 14.

If you use a Samsung phone, you can try to force LTE to see if maybe your area is covered, but just weak signal.

1. Open the Phone app
2. Type *#2263# into the dialpad (or just remember *#BAND#)
3. Select [1] Band Selection
4. Select [4] LTE
5. Select [0] LTE_ALL

Only thing is, by doing this, you cannot receive call, so once you're done with your data stuff, need to change back to Automatic.