T-Mobile don't just sell "extended warranties" they also sell theft, accidental damage, and similar even on phones (on their network) you didn't buy from them (

T-Mobile don't just sell "extended warranties" they also sell theft, accidental damage, and similar even on phones (on their network) you didn't buy from them (e.g. €10/month). There's no distinction between what they do and other insurance companies insuring the same product class do. So as I said, unless you sub-divide the insurance industry on arbitrary lines, they are both selling insurance to the consumer. Claiming that because it is only "extended warranties" (which it isn't anyway) isn't really a legal argument for trademark law. We're talking about markets here, they're both in the insurance market regardless of how you frame it.