Clean up your phone's contact list to prioritize the people you actually want to talk to. It's easy for your phone's contact list to get out of control, especially if you've carried the same growing list over to every new phone for a decade or more. If you haven't cleaned these up in a while, or ever, a decluttering is in order.
Before you begin, you should understand how contact saving works on Android and iPhone. Unlike the "dumbphone" days, where contacts were stored on the SIM card or your phone's internal storage, iOS and most Android phones keep your contacts synced to your email account by default. On iPhone, this is your iCloud account, while on Android it's your Google account.
First, you should put all your contacts in the same service. Depending on how many email accounts you have synced to your phone, your contacts might be scattered across them. Having them in one place simplifies everything and makes them easy to back up. The easiest way to move contacts is logging into the relevant account on the web, finding the Export Contacts option (which usually provides a CSV or VCF file) and then importing those contacts into your chosen service.
Now that your contacts are in a central hub, it's time to do the bulk of the work. Start by fixing duplicate entries. Google Contacts may alert you to this at the top, or you can use the Merge & fix tool on the left. Next, set up contact groups to better organize your list.
Source: Engadget · Summarized by HeadlinesBriefing