[adam rock]

is there any way to install apps from sd card without using internet connection???

[T Moore]

No.
Before the phone starts this process it has to check that the app is for the region you are in and the app is for your phone. That is why a WiFi or data connection is needed.

[sarathgopi]

yes download some XAP file and paste it in ur SD card and later paste any files and install it

[ca_guri]

yes download some XAP file and paste it in ur SD card and later paste any files and install it

No, you can't, you must require data connection for installing apps from sd card, because the store verifies the app and check I whether it is available for your region or not. So simply you cant install app without internet connection.