I got new unlocked phone last week. When i try to put my pre-paid sim card to new phone it says no service. My pre-paid sim card works well on my old iphone 4s. I tried rebooting, removing sim, check 3g network etc... Still no service on my new phone. I can see the koodo 3G and koodo 4G network on my phone setting but my phone keep showing message 'can't connect to network try later' I did check my phone imei on the 'will my phine work' they said 3G and 4G will work.. How can i use my new phone on koodo network?