If you want a cheaper, smaller phone, Apple often refreshes the SE line in March or April.
đź’ˇ If your current iPhone no longer supports the latest iOS version , it is time to upgrade for security reasons. To help you decide, let me know: What model do you have now? Is it broken , or just slow ?
If your current phone's battery is the only issue, consider a $89 battery swap instead of a $800+ new phone.