HLR (Home Location Register) :

• For GSM and CDMA wireless networks
• It’s responsibility is to authenticate and AUTHORIZE subscribers and their services.

iDEN (Integrated Digital Enhanced Network) : 

• A wireless technology for Motorola
• It has the capabilities of digi-cellular phone, 2 way radio, alphanumeric pager and data modem / fax modem in a single network
• Operational bands are 800 MHZ, 900 MHz and 1.5 GHz
• iDEN is based on TDMA (Time Division Multiple Access) and GSM architecture
• For voice compression it uses Motorola’s Vector Sum Excited Linear Predictors vocoder.
• For delivering 64KBPS over a 25 KHz channel, it uses QAM modulation.
• iDEN is designed to serve the mobile user for accessing information quickly without carrying several devices.

i-appli : 

• i-appli is a Java environment based on CLDC.
• Handsets of NTT DoCoMos are UTILIZING i-appli
• It is similar to MIDP, however both APIs are INCOMPATIBLE.

HLR (Home Location Register) :

iDEN (Integrated Digital Enhanced Network) : 

i-appli :