I was on the 3G network all this time and always wanted to try out the 4G network speed as many had claimed it to be really fast. I got my new 4G sim last month but can't seem to use the 4G network on the 1020. I checked if it was a bandwidth difference in country of manufacture and country of use but it isn't. Now I cannot even see the 4G option in the drop down list when I go to Settings>Cellular+SIM >SIM settings>Highest connection speed.... Therefore I cannot use mobile data at all. Once I put a 4G sim my local telecommunication service provider says that the 3G will not work and therefore I'm now stuck with no data. I looked up the specs of the 1020 and checked so many times and I even hard reset the phone but still doesn't show me the 4G selection in the drop down list. Anyone willing to help me out?