Cellular

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

Ankur Thakur ∙ Updated October 25, 2022

Do you get errors related to the SIM card on your iPhone 14 and earlier and don't see the cellular signal bars? As a result, you can't make calls, use mobile data, or send and 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 back up your iPhone using 5G or 4G LTE cellular data

Evan Selleck ∙ Updated September 26, 2022

Starting with iOS 16, you can back up your iPhone over cellular data (5G, 4G, LTE). In this post, we will tell you more about it.

How to fix cellular data not working on iPhone or iPad

Ankur Thakur ∙ Updated January 20, 2023

When you don't have access to Wi-Fi, cellular data, also called mobile data in many countries, is your window to the internet.

However, you might see Could Not Activate Cellular Data Network as an alert. Other times, the top status bar may only show No Service or Searching. In all these situations, cellular data won't work.

If internet via 3G, 4G, LTE, or 5G is not working on your iPhone or cellular iPad, follow these solutions to fix the issue.

Visualize your carrier’s 5G coverage with Speedtest maps on your iPhone

Christian Zibreg ∙ May 12, 2022

Speedtest maps are now available in the iPhone app. Now you can visualize your carrier's 5G service coverage, view network coverage and more.

How to check what cellular band your iPhone is using

Anthony Bouchard ∙ April 4, 2022

If you live in the middle of nowhere, then buying a cellular signal booster might be in the back of your mind. In many cases, these can improve your cellular reception by using a larger antenna to capture a distant signal and rebroadcasting it closer your iPhone. However, it’s important to get one that’s compatible with the cellular bands your carrier uses.

SignaldBm puts your received Wi-Fi or cellular signal strength in the Status Bar

Anthony Bouchard ∙ February 21, 2022

When attempting to measure your iPhone’s wireless signal strength, be it cellular or Wi-Fi, you will often see dBm (decibel milliwatts) used for the unit of measure for your received signal strength.

3DSettingsInfo displays helpful battery, cellular, & Wi-Fi information at a glance

Anthony Bouchard ∙ February 10, 2022

Whenever you’re curious about certain statistics involving your iPhone, be it battery health, current internet speed, or your current Wi-Fi network, much of this information can be found in the Settings app.

How to know whether your Apple Watch is connected to the internet or not

Ankur Thakur ∙ Updated March 6, 2024

You need internet on your Apple Watch to use Siri, make FaceTime calls, and more. If you're unsure whether your Apple Watch has Wi-Fi, cellular, or internet connectivity or not, this tutorial has got you covered. It will show you the different ways your Apple Watch can access the web and what its tiny network connectivity icons mean.

Budget carrier Visible offering eSIM-based free trial program for iPhone users

Anthony Bouchard ∙ January 6, 2022

Visible, a budget-friendly subsidiary of Verizon Wireless, is now offering a limited free trial period for iPhone users who have access to eSIM (electronic SIM) capabilities.

Why I haven’t looked back since switching to T-Mobile

Anthony Bouchard ∙ December 10, 2021

Picking a cellular provider for your phone can be a daunting choice. Although coverage from one carrier might be great for you in one location, that won’t necessarily be the same for someone in a different location.

Some of the best jailbreak tweaks for cellular connectivity on iOS 14

Anthony Bouchard ∙ October 5, 2021

After jailbreaking an iPhone or iPad for the first time, it can be daunting to find the best jailbreak tweaks for upgrading its capabilities beyond the bounds of Apple’s stock configurations. At iDownloadBlog, we know this, and that’s why we try to make tweak discovery easier for our readers.

mmWave 5G support: Non-existent on the new iPad mini‌, limited to US-only iPhone 13 models

Christian Zibreg ∙ September 16, 2021

Cellular versions of Apple's sixth-generation iPad mini don't support mmWave, a faster 5G protocol that's predominately used in the United States, at all. As for the new iPhone 13, it still restricts mmWave 5G support to the US just like its predecessor, the iPhone 12 family.