Start with safety
A recall, swollen battery, overheating problem, or unsafe charger can outweigh repair savings. Follow manufacturer and regulator instructions first.
Price the supported life
Compare repair cost with security-support time left, not only resale value. Repair is easier to justify when parts exist and several supported years remain.
Match the decision to the job
Business, authentication, and banking need more confidence than offline use. Back up data before service and erase an old phone securely.
Primary sources
Important
Device support and safety information can change. Recheck the linked manufacturer and regulator evidence before making a purchase or safety decision.