How can NatWest help you? Ask a question, search our FAQs and helpful videos, and find useful contact details in our Support Centre. Want to register your NatWest Mobile app? Find out how with our simple step by step guide and start banking on the move!. be able to log in to your Mobile app: Do you have mobile internet connection? experiencing an issue with the app you can contact us for technical support. Tools to help find your new mortgage Mortgage calculators. Get Cash is available on Android, iPhone, BlackBerry10 and Windows. Existing Customers Manage your loan Top up your loan Help to manage your money. Caring for vulnerable relatives Changes at work. Personal loans Helpful lending options.