![](/opencms/export/sites/default/BSNL/faq/images/banner.jpg)
EVDO
![](/opencms/export/sites/default/BSNL/faq/images/down_arrow.jpg)
Although fault in data card is remote, you may contact nearest BSNL Customer Service Centre for any help.
![](/opencms/export/sites/default/BSNL/faq/images/down_arrow.jpg)
The CD provided along with Data card may be used to install it. The CD is self running & interactive, you will be able to install it yourself.
![](/opencms/export/sites/default/BSNL/faq/images/down_arrow.jpg)
This depends on how far you stay from CDMA BTS, either with EVDO network or CDMA 1x. You will get very good speeds if the tower is within 2 “ 3 KMs radius.
![](/opencms/export/sites/default/BSNL/faq/images/down_arrow.jpg)
You need to visit your nearest BSNL Customer Service Centre and they will check your address.
![](/opencms/export/sites/default/BSNL/faq/images/down_arrow.jpg)
Evolution-Data Optimized / Evolution-Data ( often abbreviated as EV-DO or EVDO and often EV) is a telecommunications standard for the wireless transmission of data through radio signals, typically for broadband Internet access. It provides fast wireless broadband internet service directly to your laptop/Desktop.
![](/opencms/export/sites/default/BSNL/faq/images/down_arrow.jpg)
CDMA 1x is the previous version or the older version of EVDO.
![](/opencms/export/sites/default/BSNL/faq/images/down_arrow.jpg)
CDMA, Code Division Multiple Access, uses advanced mathematical techniques to allow multiple wireless devices to transmit simultaneously on the same frequency. Every device, such as a mobile phone, is assigned a unique mathematical signature. It applies this signature to the original signal and transmits the modified signal. A receiver applies the inverse of the mathematical operation to recover the original signal.
![](/opencms/export/sites/default/BSNL/faq/images/down_arrow.jpg)
CDMA 1x offers up to 144 Kbps.
![](/opencms/export/sites/default/BSNL/faq/images/down_arrow.jpg)
CDMA 1x is relatively older when compared with EVDO in terms of speed and performance. While CDMA 1x offers 144 Kbps, its successor EVDO offers up to 2.4 Mbps.
![](/opencms/export/sites/default/BSNL/faq/images/down_arrow.jpg)
Since EVDO devices offers backward compatibility, you can access a CDMA 1x network with EVDO device.