Pop up msg said unable to verify my iphone battery genuine, but phone was purchased less than 6mths ago and never changed any part before.

Hi there Jason-Teo,

Welcome to Apple Support Communities.

We understand that you getting this error that the battery may not be genuine and you were able to review one of the support articles. You want to make sure you iPhones running the latest iOS version shown in Settings > General > Software Update.

If you recently had your battery replaced by anyone other than Apple, an Apple Authorized Service Provider, or an Independent Repair Provider that guarantees genuine parts, we advise on contacting Apple directly for battery replacement options or you can use the locator below to find a service locations near you. See the links below.

Contact Apple Support

Find Locations

Regards.