I own an iPhone 5 that had been working well. Now, the problem I’m facing with the device is that it shuts off when the phone reaches 20 percent battery life. When I connect it to the charger, it starts charging from 20 per cent again, what is wrong with my device and how do I solve it?— Salman

Dear Salman,

This problem is usually the result of an uncalibrated battery gauge. The safety mechanism in your phone prevents your phone from completely exhausting a charge because this would mean that you’d lose one charge cycle on a Lithium Ion or Lithium Polymer battery. The problem with your phone is that since the battery percentages aren’t calibrated, the iPhone software thinks that 20 per cent is a critical level for your battery and thus, tries to save your phone’s battery by shutting off. The solution for this would be to recalibrate your battery. For you to do this, you will have to force your phone’s battery to run below the 20 per cent mark. When your phone shuts off, plug in your charger for a couple of minutes and boot up your phone. If your phone refuses to boot up, hold the home and power buttons simultaneously until the Apple logo appears. Keep repeating this process until the phone refuses to turn on and your battery drops down to a single digit number, if you can get it to reach one per cent, that’ll be ideal. Once your phone refuses to boot up, plug in your charge and continuously charge the phone for at least four hours. Boot up you phone once you’ve fully charged your battery and left it to trickle charge too, and you’re battery should be calibrated again. If this does not work, your battery might be on the verge of dying and you should think about replacing your battery if you want to resolve this issue. 

I have been using the Samsung Galaxy J7 but recently I’ve encountered a problem with the phone. The screen flickers when I turn down the brightness making it almost unusable but when I turn up the brightness, the flickering stops. Is there any way to fix this issue? — Samrat

Dear Samrat,

Unfortunately, this problem can’t be fixed because it’s a hardware issue. You probably used various different kinds of chargers that caused a mismatch between your device’s voltage and the voltage that it received from the charger. This caused voltage variation in your device which is causing the screen to flicker because of the excess voltage stored in the battery. Because of this phenomenon, your screen has permanently been damaged and the only way to fix this problem would be to replace your entire screen. I would always recommend using the charger that you got with the device and not using third-party adapters. Before you take your phone for repair, however, try updating your device to the latest firmware. The latest update has helped some users but if the problem persists, you will need to replace the screen. 

I am on Android Marshmallow and I have enabled the developer option on the settings page. But now I want to hide the developer option, but I can’t find a solution on how to disable this settings feature. How do I go about hiding the Developer Option on Android? - Saprunika Kharel

Dear Saprunika,

If you just want to stop using the features of the Developer Options page, there is a neat and tidy on-off toggle on the top. This will stop all the features of the developer options page but it won’t remove the option from the Settings app. But if you want to completely hide the option, open the Settings app and navigate to the Apps menu. Inside the Apps menu, find the Settings App (the same app that you’re currently on) and open it. Inside the app menu, navigate to the storage option and find two buttons. Click on the ‘Clear Cache’ and ‘Clear Data’ options in the order and the settings app should shut down. Open the app again and the developer options should be gone.