Searched some posts and I saw some unanswered post regarding Blackberry plan(okay, I know its market share is slumping, and not as popular as Android/ Apple… but I still need to ask)

Any helpful U Mobile staff here willing to help since U Mobile with its competitive pricing are really inching the urban market?

https://www.u.com.my/blackberry/prepaid
Any prepaid umobile/ BB user here care to enlighthen any additional monthly cost except the RM19 for 1 month/ RM34 for 2 months? Do we need to top up separately to maintain the active status of our prepaid card and how much it cost to call/ SMS?

https://www.u.com.my/prepaid/unlimited-mobile-internet-plan
Let’s say if user currently on Unlimited Mobile Internet UMI 18 (but cannot fully utilise BB full features), so if user subscribe to BB RM34 for 2 months + 600MB plan , can user stop its UMI 18 or user need to continue UMI 18 to call/ SMS? also if the internet data plan sums up to 600MB or 850MB (600MB+250MB)