It may come as a surprise but market places need to adapt to the very fact, that not every one has, or uses a phone. Trade me, in respect of that choice,  needs to remove the mandatory requirement of a phone being required to complete a sale , and instead make it an optional requirement.   It otherwise is discriminatory Humans Rights Act 44(1) (b) namely provision of goods and services,   that some can access to purchase only because they have such a device , and others who do not as a result of age or disability , cannot .