So my iPhone 7 contract has recently ended and today I have tried to upgrade to a Galaxy A71. However, when I got to the order summary page to confirm the order a red text box came up saying that some details were missing. I recently moved house in July and then changed the address on my IDMobile account, to match the address I moved to. Other than that, all the information has stayed the same. I also changed my address registered with the bank to my new address when I moved so I assumed that the IDMobile address and bank address need to be the same in order to upgrade.