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Carrier Compatibility Checker
About to buy a cheap unlocked phone from Amazon? Pick your phone and your carrier and we'll tell you green / yellow / red — including 5G band compatibility, the thing that quietly kills deals.
Band compatibility is the silent killer of cheap-phone purchases. A "green" verdict here means full LTE + 5G; "yellow" means LTE only (no 5G on this carrier); "red" means it may not register at all. Full unlocked-vs-carrier guide →
Background reading
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Unlocked vs Carrier Phone: Which Is Actually Cheaper?
Carrier deals look like free phones, but the math is trickier than it appears. Here's how to compare the real 36-month cost before you sign anything.
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Best Phone Under $500 in 2026 (We Tested 12)
You don't need to spend $1,000 to get a great smartphone. Here are the best phones under $500 right now — tested, ranked, and explained in plain English.