Guys, i wish to try YES power 35 postpaid package.

Just a few questions:

1. Since the hotspot data quota will be used from the main data quota 100GB, so i can use in any compatible 4G LTE router such as Tenda 4G router yes? Won’t get any penalty or warning from YES?
2. This package has contract? Or no contract?
3. If i exhausted the 100GB, what are the additional topup i can get? Example, 5GB need to pay how much, 10GB how much, etc?
4. I saw in YES website stating uncapped 4G/5G speed. If 4G, how fast it will be in average ya?
5. RM35 monthly exclude SST will be permanent or this is just a promo period? Say after 6 months will revert to RM49?

Main use will be at office. Right now, i am using Unifi Air, but paying RM79 for almost 8 months, i can only get max 15Mbps DL 10 Mbps UL due to not much coverage.
Just use for normal office works, some light FHD youtube videos as well as monitoring 2 cheap china mari IP CCTVs.
No 5G coverage yet, hence i only interested in using 4G LTE.

And i am looking to cut down some unnecessary costs, given that our economy is quite bad now.

Appreciate your input guys!