Hi there. I have inserted my sim into a brand new S5, purchased overseas. when the phone is turned on, it recognises a sim card has been inserted. it asks if I want to make changes etc. If I go to wireless and networks under the settings, it will not let me access anything under mobile networks. it also wont let me activate the data connection. it does however connect to the wifi. please can you let me know what the problem could be and how I can go about rebooting, restoring functions and getting the network to connect.