Is there a way to acess Service Mode on this variant of the S5? I tried setting shortcuts, using nova launcher, and a lot of other things but dialer codes are turned off. I can't even dial to check the IMEI which is sad. Is there something I'm missing or is root necessary to enable hidden dialer codes? Reason i need to acess service Mode is to change the Network Band to LTE/GSM so I can use LTE on T-Mobile network. When I go to settings, applications, all, I see the IOTSERVICEMODE and Service Mode app on the system