1. Major U.S. Wireless
Carriers
{ Technology Comparison

2. { CDMA
{ GSM
 Phone is linked to a  Uses a Subscriber
specific wireless Identity Module (SIM)
card
carrier
 SIM card can be
 International changed to use phone
roaming limited to on another carrier
specific countries  This includes
international carriers
There Are Two Network
Technologies

3. { CDMA
{ GSM
 Sprint Nextel  AT&T Mobility
 Verizon Wireless  T-Mobile USA
Which Carrier Uses Which
Technology?

4. 4G Networks
{ What does it mean?

5.  They are LTE, HSPA+, and WiMAX
 4G networks use one of the previously
described network technologies (GSM or
CDMA)
There are Three 4G
Network Types

6. Wireless
Network
Technologies
GSM CDMA
LTE HSPA+ WiMAX
Hierarchy of Networks

7.  Based on GSM
 Used by AT&T and T-Mobile
 Available in more areas than LTE and WiMAX
HSPA+

8.  Based on GSM
 Used by Verizon Wireless, AT&T, and Sprint
 LTE phones on Verizon and Sprint use GSM
and CDMA
 This can lead to increased power usage
LTE

9.  Implemented by Sprint Nextel
 The company has announced they will cease
deploying WiMAX, opting for LTE instead
 For this reason, WiMAX will not be included in
the following comparison
WiMAX

10. { HSPA+
{ LTE
 Larger service area  Up to 2x faster
 Global roaming  Compatible devices
option may use more
power
Advantages