neilchauhan2, Feb 5, 2019 : Who are the users? This feature is going to be beneficial for everyone. What is the proposed function? So, after a lot of debate over this idea in the comment section, I have come up with a PART - 2 of this idea. So, PART - 1 and PART - 2 of this idea together would ensure that the device is in the right hands. PART - 1: At some point of time of life we all visit crowded places, and the biggest pain at those places is the threat of theft. I remember last year I was travelling to college in a very crowded bus and someone inside the bus stole my phone. I tried a lot to find the location of the phone, so that I could get back my phone but I was unable to do so. Something similar happened with my dad as well, he lost his OnePlus 3t. Its very painful when you lose your device and you couldn't find it. So, the Part - 1 of the idea is having two phases: Phase - 1 We know that the OnePlus devices have an awesome face recognition and fingerprint scan feature, so it would be great if we could utilize these features to find whether the device is in some wrong hands. Let's go into the details of this feature. So, according to my feature we can register the SIM card inside the phone's internal storage the very first time the user boots up the phone, or at a later stage when he feels like migrating to a new network, such that even if someone tries to factory reset the phone, the device still knows which SIM was placed inside the device. Only the user who owns the device can register any new SIM cards whenever he wants. Now to register the SIM card the phone does two authentications: 1. Face Recognition 2. Fingerprint Scan. After the authentication is done the user can register the SIM card and use it, this way the device would know which SIM cards are owned by the user and are valid to be used. Phase - 2 Now each time someone tries to place a new SIM card in the SIM card slot which is not registered by the user, and turns on the device, the phone will perform a double authentication: 1. Face Recognition 2. Fingerprint Scan. Once the authentication is done and the device knows the user is trying to add a new SIM card is an authentic user the device will add the new SIM card and register it, but in case the authentication fails, the device would automatically turn on the location which can not be turned off until the original owner of the phone performs the authentication. Now the phone will constantly send the location of the device on some secondary devices which the user can register at the time of SIM card registration. Now this location can be used to trace the device and return the device to the original owner of the phone. PART - 2: So, according to part - 2 of this idea, if the OnePlus team develops an app where users can register their devices using the IMEI number of their devices, the app would show the location of the device at all points of time. Now, even if someone factory resets your phone, or tries to root it, or performs any other hack, he would never be able to erase the IMEI number and in this way the owner of the device would get to know where his phone is. Now, someone in the comment wrote that now a days thieves don't use the phone for communication, which means they don't require a SIM card to use the phone, in that case the part - 2 of this idea would definitely work out, as the thief would require internet access to watch videos or play video games, and even if he does not, he would definitely require internet at some point of time, and as soon as the device gets internet access, it can send information about the location on the app and the owner will get to know where the device is. So, in this way its going to be a double trap for the thief, if he adds a New SIM card, part - 1 of the idea would be executed and the owner would get to know. And, if he tries to use the phone without the SIM card, part - 2 of the idea would get executed, and the owner would get to know about his device. What is the user value? All the users having a tough time keeping their phone secure from theft would be really happy. Me personally as a user and my dad who lost his OnePlus 3t would be happy as well, as we don't have to worry for the security of our phones. I believe this feature would definitely make lives of people living in a crowded area or travelling around a crowded area a lot easy. If both part -1 and part - 2 of the idea are implemented its going to be a win - win situation for everyone. If there are existing comparable functions in the smartphone industry, how is your proposed feature superior? Don't know about the current scenario, but earlier when touch phones were introduced there used to be a feature similar to this, where every time a new SIM card is placed in the device the user gets notification on their secondary devices. But the problem was, that due to lack of technology at that time, that method was very inefficient. So, if part - 1 and part - 2 are used together its going to be a feature which only the OnePlus devices are going to have, which other competitive companies lack and in this way the OnePlus team can take a lead over other companies. The anti - theft feature is something which has been overlooked by every company. So, this feature can definitely give the OnePlus team a lead.