If you are staying in Brinchang, Strawberry Park Resort the wifi doesn't work at all & you have to pay, wifi in Brinchang is not that good, maybe due to the height from sea level. Have not tried equatorial.
There is a Starbucks at Tanah Rata, they offer free wifi & Rosetta a quaint little cafe that sells yummy food from steamboat to wetstern to Japanese to Cantonese...a must try, that cafe offers free wifi.
http://tanah-rata.blogspot.com/
So far, my luck with wifi at Brinchang wasn't that good & did not have much time to relax at Starbucks at Tanah Rata, but ate at Rosetta & wander around Tanah Rata.
The next trip I will test my Celcom mobile broadband see if it works in the highlands ( i have subscription to Celcom M broadband) and explore lakeside & then ringlet.
There are commercial banks at Tanah Rata, where if you run out of cash, you can use their ATM's that supports MBPS, plus & any SINgapore banks ATM cards withdraw in RINGGIT. There is also a post office next to Starbucks...
Go try the wifi & post your results here, for the many times I went up to Brinchang the hotel wifi is out of order due to the weather. I only paid to use the hotel broadband which incidentally crawls..
Good luck...& remember Cameron Highlands is not at sea level....