Yay! My new modem is arrived! It was Bolt!Super4G modem by Internux. A very unfortunate thing is that the modem itself had a low signal in my place. But, let’s not focus on that. I can use this modem elsewhere and different modem in my place.
Overall the result is very satisfying. I suggest if you’re Indonesian and want to buy one, try your friend’s first if they had any. Maybe the signal is not so strong in your area, but everything is worth to try.