If you experiance any of the following problems with your smartphone it might be time to get a new one:

Performance: If your smartphone is noticeably slower, experiences frequent crashes, freezes, or lags, it may be a sign that the hardware is outdated or the software is no longer optimized for the device.

Battery Life: Over time, smartphone batteries degrade and may not hold a charge as well as they used to. If you find yourself constantly needing to recharge your phone throughout the day, or if the battery drains rapidly even with minimal usage, it could be time for a replacement.

Software Support: Manufacturers typically provide software updates for smartphones for a certain period of time after release.
When your device no longer receives software updates, it may become more vulnerable to security threats and compatibility issues with newer apps and services.

Physical Condition: If your smartphone has significant physical damage such as a cracked screen, broken buttons, or water damage that affects its usability or functionality, it may be worth considering a replacement.

Desired Features: As technology advances, newer smartphones often come with upgraded features and capabilities such as better cameras, faster processors, improved displays, and support for new wireless technologies.
If you find yourself wanting features that your current device lacks, it might be time for an upgrade.

Cost of Repairs vs. Replacement: Consider the cost of repairing your current smartphone compared to the cost of purchasing a new one. In some cases, repairing an older device may not be cost-effective, especially if it is nearing the end of its useful life.