From a legal view EE could be in breach of contract under the sale of goods act, faulty goods or the service there advertising isn't fit for purpose. I've been a customer for years previously Orange. I have 4 mobile phone contracts, broadband, it's a disgrace the service there providing. I've tried uninstalling the app, it seems to work for that one log in then your get the pause and refuses to load. I've given up and looking at an early exit with the help from the ombudsman.
