Identify and block spam calls or SMS, search for unknown numbers, call and chat with friends. With a community-based spam list from over 250 million users, Truecaller is the only phone app you'll ever need. Truecaller respects your right to privacy.How can I track a call from another phone ?Four Steps to Track Incoming and Outgoing Phone Calls1. Step 1: Create A PanSpy Account. ...2. Step 2: Select A Subscription . ...3. Step 3: Install PanSpy App on Target Phone. ...4. Step 4: Start Tracking Outgoing and Incoming Phone Calls.How can I track a person by mobile number?To get real-time results, IMEI & GPS call trackers can be used to track the location of a phone call. Apps like GPS Phone & Locate Any Phone are great with tracking mobile phones, even when the phone is not connected to the internet. You can know the GPS coordinates of a phone number within secondsWhy does my number show up as unknown?This error commonly occurs when you transfer the number you were using on your old phone over to your current phone. ... Your phone in this case will list your current number as 'unknown' rather than incorrectly present the number originally assigned to the SIM card.Why does my iPhone show up as unknown?It sounds like your Caller ID may be disabled. Okay if the setting is enabled (showing green) I would suggest contacting your carrier, as it may be something on their end. You can also contact Apple Support.Why does my number show up as unknown?This error commonly occurs when you transfer the number you were using on your old phone over to your current phone. ... Your phone in this case will list your current number as 'unknown' rather than incorrectly present the number originally assigned to the SIM card.