SmarTone Vodaphone Mobile Broadband currently have an offer of HK$188 per month for 'unlimited' local data usage (24 month contract). More expensive package available for faster speeds.

I have some questions about this plan which I hope someone more technically aware can answers for me.

I'm currently a smarTone mobile phone user (about HK$110 a month for hundreds of minutes which I never finish). Could this contract replace my mobile phone contract as well as giving me 'mobile broadband' with my laptop? If I'm correct, are there any downsides to this contract - for example if I'm using the 'mobile broadband' on my laptop, I cannot use my mobile phone?

I'm not a heavy Internet user - just using for checking emails and forums such as this one usually. Any uploading or downloading I can use the office Internet.

Sorry for my ignorance if my questions appear stupid. Thanks in advance.