Hi, I have a new A52s, I bought it off Amazon, and didn't realise it was a grey import. It works fine with my provider (iDMobile in the UK), apart from WiFi calling. iDMobile say the problem is because it's German firmware (DBT CSC), so I started reading up on how to change this. All of the tricks using the phone dialer codes no longer work, so I downloaded the UK Unbranded firmware (BTU CSC), and flashed with Odin. However my phone remains as DBT. I ran Phone Info, and that says that my current firmware is only DBT CSC, with no others available. Anyone know how I can get this switched to UK CSC?