Default [Q] No EDGE service detected only GPRS

I have Samsung SII HD LTE SHV-E120L. 3G and 4G recently launched in Pakistan and not available in whole country. When I connect to network only GPRS service is detected and No EDGE service at all. I try with default Android OS I.e 4.1.2 after I flashed with Hellkat 4.4.2, but EDGE problem is still there.
In Network APN settings I only found three options
I. LTE
ii. eHRPD
III. unspecified
GPRS is very slow. I wanted to use EDGE till the 3G coverage.
Please Help!