Nope and not recommended as well. With a personal mifi device, you're better off setting WPA2 and a strong password.

Also the negative balance only happened when they gave the complimentary 10GB last month.

Now no more, you won't get the negative balance and internet access will cut off once hits RM0.
A minimum of RM30 will be deducted every month or else if it doesn't find that amount , you'll get a negative in this case.

That's why don't top up too much in your account. Those who subscribed to the prepaid RM1200 with Free Huddle plan have to be very careful or else you'll be paying RM50 for the next 24months while still having to top up a minimum of RM30 for the next 2 years to keep your account alive.

The system deducts RM30 minimum every month regardless if you use or not from the balance. More is ok.

When you buy the RM1200 plan, RM1200 will be pre-credited into your account. They never say it'll last you for the next 24months.
What if you use it heavily like RM200 for the first 6 months all the amount will be used up already...requiring for further top up to keep your account active.

An example:
Say the 1st month - you use up all the RM1200 because someone stole your account's access.
Your balance will be RM0

Second month when time comes for another minimum RM30 deduction. Where will you get the credit to offset the amount?
-RM30?

I don't get it because I did not subscribe to that plan due to the risks involved. If you pay RM50 every month meaning will that amount only be credited into your account while when you swipe your CC for easy payment, Yes sells you the Huddle for the full price?

If the RM1200 is paid in advanced, and you lost all of it in just the 1st month then that's really not worth it.
Dust bitten and got nothing...