[WPCentral Question]

i can't see dial numbers and sms of sim 2.. so pls explain me how to use both sim in this phone..

[DecaTec_de]

On WP8 you'll have two tiles (phone and messages) for every sim each - so four tiles in total.
On Win10TP you'll only have one tile for phone and messages, but you'll find kinda combo box where you can select which sim you want to use when making calls or writing messages.

[RumoredNow]

Here is the official Help Page: Use a dual SIM phone | Windows Phone How-to (United States)