The is update to the 7510 adds Bluetooth, GPS, more memory, and enhanced attachment viewing. Other features include a large color display, push email, wireless organizer sync, Java, speakerphone, PTT, and a QWERTY thumb keyboard.
Specs

Modes
iDEN 800
Weight 6.1 oz (173 g)
Dimensions 4.5" x 2.9" x 1.1" (114 x 74 x 27.9 mm)
Form Factor
Bar
Stub / Extendable Antenna
Battery Talk: 2.9 hours max. (175 minutes)
Standby: 75 hours max. (3.1 days)
LiIon
removable
Display Type: LCD (Color)
Resolution: 240 x 160 pixels
Colors: 65,536 (16-bit)
Platform / OS
(proprietary)
Processor ?
Memory 32 MB (internal memory available to user for storage)
Phone Book Capacity ?
FCC ID
L6ARAL11IN » (Approved Nov 17, 2004)


Features

GPS / Location
Yes
ACCESSIBILITY
Hearing Aid Compatible
Rating: M4, T4 (very tele-coil compatible)
ALERTS
Ringer Profiles
Yes
Vibrate
Yes
CONNECTIVITY
Bluetooth
Supported Profiles: HSP, HFP
version 1.1
PC Sync
Yes
USB
Yes
CONTACTS
Multiple Numbers per Name
Yes
DATA & NETWORK
Data-Capable
Some versions only
WAP / Web Browser
Yes
INPUT
Side Keys
roller wheel plus Esc key
Text Keyboard
Layout: QWERTY
MESSAGING
Email Client
supports attachments
Text Messaging
2-Way: Yes
PRODUCTIVITY
Alarm
Yes
Calculator
Yes
Calendar
Yes
To-Do List
Yes
SOFTWARE
Games
Yes
Java (J2ME)
Yes
VOICE
Headset Jack (2.5 mm)
Yes
Push-To-Talk
Type: iDEN
Speaker Phone
Yes