Many carriers no longer support the iPhone 5s model even if it is unlocked because it runs on old software. Check with your carrier if you plan on
iPhone 5s Silver 32 GB Softbank - スマートフォン本体
iPhone5s (64GB)
iPhone Models
APPLE IPHONE 6 16GB Space Grey, Poor Condition, visible signs of
Introducing Apple iPhone 5s
Introducing Apple iPhone 5s
In depth review: Apple's iPhone 5s running iOS 7
Identify your iPhone model - Apple Support (JO)
iPhone SE Silver 64 GB Softbank
How to upgrade my iPhone 5s to iPhone SE - Quora
What is the difference between the iPhone 5S and SE? - Quora
Apple iPhone 5s Specifications, Price, Features, Review
Identify your iPhone model
What is the difference between the iPhone 5S and SE? - Quora
Differences Between iPhone 5, iPhone 5s, iPhone SE: EveryiPhone.com