Would you Like to have a Smoken fast SD card to go into your Pretty Smart Phone Well Sand Disk has Answered the Call Take a look this: Looks really Good 
b33
Check out the Link to see the Rest: On this Great Card
That's a MicroSDHC but most devices are only MicroSD and they wont read the newer cards that are in this format..
May want to investigate a bit more before ordering this B33 because I believe the Maxx is MicroSD only.. Check this out..
http://www.mobileburn.com/definition.jsp?term=microSDHC
It's Ok Wildman the SD that i pulled out of my Maxx is a 16GB Class 6 SDHC I did Look at it again Just to Make Sure it had those Markings on it.. It was the Card from My first Maxx. But thanks again for the Heads up an Making sure it was the Right one..b33 
Update: Wildman i did some Reading.! Glad i did Even though the Card can be used like in a Device Like the Razr Maxx the device has to have The Class 1 rating on it to Achieve the Speeds of the Card. So It can be used in them but at a Reduced Speeds..
Here is the Card i Used in my Maxx Wildman
http://www3.pny.com/16GB-Hi-Speed-MicroSDHC-Class-10-for-Tablet-PCs-P2997C460.aspx