A37 HD comes with Dual SIM Support. Now you can make voice calls , send text SMS and Enjoy faster Internet as SIM 1 is 3G enabled. A37 Come with Android 4.1 Jelly Bean OS. Android 4.1, Jelly Bean, is the fastest and smoothest version of Android yet. Jelly Bean improves on the simplicity and beauty of Android 4.0, and introduces a new Google search experience on Android. TA-FONE A37 HD is powered with Dual Core processor "1 GHz" Speed. A37 HD can be completely locked with its unique Pattern Lock. Have complete control over your phone now with the most stylish way of securing your Android.