T-Mobile Stretches Zero-Interest Device Financing to 36 Months

T-Mobile's EIP Flex 36 extends interest-free, zero-down financing from 24 to 36 months for well-qualified customers on phones, watches, and tablets. Lower monthly payments come at a cost: larger remaining balances at upgrade time and a longer effective carrier lock-in. The plan stacks with trade-in credits and device promotions.