I want new iOS version

These are the iOS options based on iPhone Model --> Learn how to--> Update your iPhone, iPad, or iPod touch - Apple Support

You need to Identify your iPhone model - Apple Support

• iOS 14.3 —> 6S / 6S Plus, SE (1st Gen and 2nd Gen), 7 / 7 Plus, 8 / 8 Plus, X, XR, XS /XS Max, 11,11 Pro /11 Pro Max, iPhone 12, 12 Mini, 12 Pro, 12 Pro max
• iOS 12.5.1 —> Final release supported on iPhone 5S, iPhone 6/6 Plus, iPad Air, iPad Mini 2, iPad Mini 3 and iPod Touch (6th generation)
• iOS 10.3.3 —> Final release supported on iPhone 5C and iPad (4th generation)
• iOS 10.3.4 —> Final release supported on iPhone 5 and iPad (4th generation) Wi-Fi + Cellular
• iOS 9.3.6 —> Final release supported on iPhone 4S, iPad 2 Wi-Fi + Cellular, iPad (3rd generation) Wi-Fi + Cellular, and iPad Mini (1st generation) Wi-Fi + Cellular
• iOS 7.1.2  —> Final release supported on iPhone 4.
• iOS 6.1.6 —> iPhone 3GS and iPod Touch (4th generation) only
• iOS 4.2.1 —> Final release supported on iPhone 3G and iPod Touch (2nd generation)
• iOS 6.1.5 —> Final release supported on iPhone 3GS, and iPod Touch (4th generation)
• iOS 3.1.3 —> Final release supported on iPhone (1st generation) and iPod Touch (1st generation)

Apple Support Community Forum

This is Apple Support Community forum, for user to user interaction for information & idea sharing between users, if need be, extend support on technical knowhow in handling Apple products from more experienced fellow user, This is not the right forum to discuss with Apple Inc.