with this budget you are looking for 4G modem with manual lock band 28
6) Band 28 hanya ada di kawasan liputan 5G
Modem yang support Band 28 (Huawei List Sahaja)
1) Huawei E5786s-63a
2) Huawei E5573s-606
3) Huawei E3372h-607
4) Huawei E8372h-607
5) Huawei B315s-607
6) Huawei E5186s-61a
7) Huawei B525-65a
8 ) Huawei B618s-65d
9) Huawei B818-263
10 - olax Ax9 pro

For that budget you will NOT be getting a 5G router
So, you'll have to go with a 4G Router which unlike Yes, U Mobile does allow you to use with 4G so no problem there

Personally I'll go with something from a reputable brand like TP-Link or D-Link and avoid those turbo gt900+++ ones that are kinda sketchy
And maybe also consider Tenda and Mercusys

For that price range, you'll be getting a basic 4g router without any of the fancy features like aggregation for faster speeds
So, realistically, expect roughly 30Mbps as what you will get