Hi,random question but I have received this router from Three and it's locked to them.To be fair Three have been helpful but after a number of calls, including 1 to Huawei,the router is still locked to Three.Not a problem per se but I wanted to change the APN to test something and also use an EE Sim occasionally as a comparison.Three have provided the unlock code but the router says "your device is permanently locked,refer to your network provider for assistance".Does anyone have any suggestions? I'm waiting on an 8th call back from Three soon! Thanks