Ankur Thakur

Ankur has been an Apple user for over seven years. At iDB, Ankur primarily focuses on iPhone, Apple Watch, AirPods, and Mac tips, guides, how-tos, and fixes. He loves to test things thoroughly before putting them in his articles. Someday in the near future, he wants to have a personal office outfitted with Apple products such as Apple TV, HomePod, iMac, and more. Besides writing about Apple, Ankur likes to watch tech videos, romantic and comedy movies & TV shows, listen to very old songs, and eat pizza and chicken. Twitter: @iAnkurThakur

How to lock your Telegram chats on iPhone, iPad, and Mac

Lock the Telegram app to secure your chats

With over 700 million active monthly users, Telegram is one of the most popular instant messaging services. If your friends and family use Telegram, you might have private conversations that you don't want others to see. This is especially true if your acquaintances frequently borrow your iPhone to watch YouTube, see photos, etc.

Thus, to prevent unsolicited access to your Telegram chats and channels, you can easily put a lock on the app.

How to lock your WhatsApp chats on iPhone like a pro

Two iPhones on a gradient green background showing locked WhatsApp and locked WhatsApp Business

Once you set a passcode on your iPhone, it secures all your apps and data. However, if you hand over your unlocked iPhone to nosy people, it's possible they will peek inside WhatsApp to see what you’re up to! Thankfully, WhatsApp offers a built-in option to lock the app.

In this tutorial, we show you how to enable password or Face ID/Touch ID lock on WhatsApp for iPhone to protect your chats. The process to lock WhatsApp Business is the same.

How to fix Screen Time not working on iPhone and iPad

Screen Time on iPhone

Screen Time is a powerful feature that lets you do several things, like understanding your device usage, blocking apps, setting restrictions, and more. Follow these solutions if Screen Time is not working on your iPhone or iPad. These fixes apply to all versions of iOS, including iOS 15 and iOS 16.

How to automatically change your Mac’s wallpaper at regular intervals

Automatically change Mac wallpaper

Recently, we published a tutorial on how to automatically change your iPhone wallpaper every day, and readers loved it. Getting motivated by that article, we decided to do a similar one for Mac! And as it turns out, doing so on a Mac is extremely easy.

In this tutorial, we show you how to change your Mac's desktop wallpaper automatically at regular intervals. You can customize it to have a new wallpaper every day, every hour, every minute, and more.

Plus, we also tell you how to create a custom dynamic wallpaper file that will automatically beautify your Mac's desktop with a different wallpaper based on the time of the day you set.

How to fix No SIM, SIM Not Valid, and other SIM card issues on your iPhone

iPhone showing No SIM error on screen

Do you get errors related to the SIM card on your iPhone and can't see the cellular signal bars? As a result, you can't make calls, use mobile data, and send or receive texts?

Usually, this happens due to problems with the SIM card you're trying to use. Your iPhone will show error messages like Invalid SIM, No SIM, No SIM Card Installed, SIM Not Valid, SIM Not Supported, and SIM Card Failure.

Other times, the fault may be with your iPhone because of which it's failing to recognize the SIM card. Let's tell you more and show you how to fix SIM card issues on your iPhone or cellular iPad.

How to save your documents in Google Docs as PDF on iPhone and web

iPhone mockup with a Google Docs document on its screen along with the red PDF and iOS Google Docs app icons in the sides

Google Docs automatically saves your work in the cloud or locally on the device at short intervals when you’re working inside its editor. For versatile use cases, like easy file sharing, you can export a Google Doc as a PDF file. Let’s show you how to do that in the Google Docs app on iPhone or iPad and a web browser on Mac or PC.