At first, things looked good when I saw the main page of Smart's Surf Max a few days before it's debut last Halloween. Yesterday, they got more details on their FAQs section and it revealed more info for you to watch out
First off, there will be different keywords for 3G-capable and LTE-capable Smart Prepaid SIM, Talk N Text (same keywords for 3G Smart Prepaid) and Smart Bro for registration. Good thing for both Smart Bro Prepaid and Postpaid, no specific registration if your SIM is 3G or 4G. You can check out the table below.
And the sad part which we found at this link and if you'll click either the Smart Prepaid or Smart Bro - there's a part that Surf Max will now have 800 MB data cap. Text messages will be sent once you already consumed 640 and 800 MB of data unlike in their previous Unlisurf promo/s which based on my friends, they can consume over a GB