Re: 2G only?
"losses caused by the action (or lack of action) of a third party."
However the fact the phone will last 6 months in the country in which it's been sold, rather than the 2 years which a £50 2g phone ought, and the retailer knows, and the customer doesn't, is precisely a latent defect, of the category which good faith requires the retailer to disclose. SOGA stipulates durability and (which is the same thing) fitness for purpose over the expected lifetime indicated for the pricetag. Of course it's UK not Irish law, however unquestionably Ireland has its equivalent.
£50 generally, and specifically for a £10 phone, is well outside the category of 'trifles' which the common law won't deal with. The fact you earn enough not to worry about it doesn't bear upon the legal position.