To answer your questions:
1. Tattoo Prepaid 4G mobile wifi runs on Globe's 4G network at speeds of up to 7.2 Mbps.
2. To claim the freebie, you simply need to text FREE1 to 8888. A notification will be automatically sent to your account once you have successfully activated the promotion. Take note that your FREE one (1) hour non-stop browsing is valid for one (1) day upon activation of the registration to the promo. Although the promo is FREE, and you will not be charged for registering, you need to have at least P1 balance to avail of the promo for FREE. A maintaing balance of P5 is also needed to consume the FREE browsing hour. You can text PSURF TIME STATUS to 8888 to get the status of remaining free internet time.
3. You can indeed connect up to ten (10) devices.
If you have any further questions, I suggest you to raise this to our Twitter Specialists at http://www.twitter.com/talk2GLOBE or any of our support channels listed at http://www.globe.com.ph/contactus and they'll be more than happy to assist you with your account-specific concern.
The 4G referred to in Globe's "4G Mobile Wifi" is that of HSPA which is actually a 3.5G or 3.75G or even technically a 3G signal which is marketed as "4G" by many networks. In fact, a rival network has already used "5G" for a technology not yet defined by international standards. Don't be surprised if your device does not show up as 4G.