1. Find the purchase record: If you have ever bought a mobile phone on an e-commerce website or a physical store, you can find the purchase record to determine the purchase date of the mobile phone. On the e-commerce website, you can find the order record or delivery address, which can help you determine the purchase date of the mobile phone. If you buy a mobile phone in a physical store, you can try to find a receipt or invoice to get the purchase date information.
2. Check the mobile phone warranty card or purchase invoice: When buying a mobile phone, the warranty card or purchase invoice and other documents are usually attached. Check these documents to know the specific purchase date of the mobile phone.
3. Check the mobile phone settings: In your mobile phone settings, there are usually related information such as system version and baseband version. Based on this information, you can judge the specific production date and release date of your mobile phone.