Free wi-fi is one of the perks hotels offer, but the free wi-fi may be worse than no wi-fi.
The website petergreenberg.com found the free wi-fi offered in guest rooms at Hilton and Hyatt hotels is too slow to stream videos or download large files. Only the higher-tier loyalty members get the premium high speed service for free.
Marriott is offering basic wi-fi to their lower-tier loyalty members. But to qualify, you have to book directly through the hotel's website, app, or reservations line.
When you read the fine print in the free wi-fi agreement, you may find the service is limited to a certain number of devices. So two phones may be included but your child's ipad would be extra.