


Apple released the iOS 17.2.1 update on the 20th of last month. The internal version number of this update is 21C66. The main purpose is to fix some important bugs and solve the problem of battery draining too quickly in some cases. Although iOS 17.2.1 is only a small update, many old users, such as iPhone SE 2, iPhone 12 and iPhone 11, etc., said that the battery life after the upgrade is good. Sadly, though, some iPhone users are facing cellular connection issues after two weeks of use. This problem may affect users' network experience, but we believe Apple will solve this problem as soon as possible. With this update, Apple has also paved the way for the upcoming iOS 17.3. Users can look forward to better functionality and performance in future updates.
#According to user feedback in the Apple support community, after the iOS 17.2.1 upgrade, some users of the iPhone 15 series encountered the problem of being unable to connect to the operator’s signal. The problem prevents the ability to make calls and use cellular data.
After upgrading to iOS 17.2.1, I was unable to receive calls, reset my phone while on cellular, contacted my service provider, and changed my SIM card, including restoring it to Factory settings cannot solve the problem.
The above is the detailed content of Solve the problem of phone and cellular Internet failure after upgrading to iOS 17.2.1. For more information, please follow other related articles on the PHP Chinese website!

In-depth comparison between the 2025 iPad Air (M3) and the 2024 iPad Air (M2): Is the upgrade worth it? Apple has released a new iPad Air equipped with an M3 chip. The new tablet balances ease of use and economy and brings performance improvements to veteran users. But how is it different from the previous generation M2 iPad Air? Let's find out. Appearance design: Completely consistent The appearance of the new iPad Air is almost exactly the same as the M2 iPad Air released in 2024, and it is also exactly the same as the M1 iPad Air in 2022. 11-inch and 13-inch screen sizes (symmetrical bezels), size, weight and even color

summary iOS 18 eventually added support for RCS messaging, benefiting many users, but initially excluded T-Mobile-based carriers. The second iOS 18.4 beta now brings RCS messaging capabilities to Google Fi on iPhone and other T-Mobile-based carriers. The update also includes new features such as priority application notifications, visual smart shortcuts, new emojis, and Apple app shortcuts. Apple released iOS 18 in September 2024, and with it comes the long-awaited RCS messaging feature – at least for some

New iPhone iOS updates are automatically reactivating Apple Intelligence, even for users who previously disabled it. This unexpected behavior, whether a bug or intentional, is causing frustration among users. The recent iOS 18.3.2 update, primarily a

Maximize Your Lifespan: iPhone Apps for a Healthier, Longer Life Groucho Marx famously aspired to live forever, or die trying. While immortality remains elusive, we can significantly extend both our lifespan and healthspan (the length of time we enj

RCS message: Missing links for iPhone users iOS 18 has been released for more than five months, which means Android and iPhone users can finally experience the RCS messaging feature. However, not all users can enjoy this convenience. Some small carriers still don’t support RCS, and Apple seems to be responsible for that. The importance of RCS Before discussing the attribution of responsibility, let’s first understand what exactly RCS is and why its broad support is so important. RCS is actually an upgraded version of the old SMS standard, which makes the traditional SMS experience closer to modern instant messaging applications. RCS functions include viewing the input status of the other party and reading receipts (if the other party has enabled it

Apple's new iPad (11th generation) review: performance upgrade, but lacks AI capabilities Apple finally updated its entry-level iPad after more than two years. While the entire iPad product line is still a bit confusing, the latest 11th-generation iPad doubles storage space while maintaining its original price, but it also lacks an important feature set. Apple today released the new iPad Air equipped with a powerful M3 chip and a new Magic Control keyboard, and focused on its AI capabilities. However, the company also quietly updated its entry-level iPad. If you're looking for an affordable iPad, the 11th-generation model that will be available next week may be exactly what you're looking for. Interestingly, the new entry-level iPad has made a good upgrade

AirPods: The Hype Fades, Reality Sets In Remember the excitement of unboxing those pristine AirPods in 2016? Apple's groundbreaking wireless earbuds promised a revolution in audio. While initially captivated by their sleek design and seamless wirel

Top iPad Air 11-inch Cases: A Comprehensive Guide (Updated 03/14/2025) This updated guide showcases the best iPad Air 11-inch cases available, catering to various needs and budgets. Whether you own the new M3 or the M2 model, protecting your investm


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

SublimeText3 English version
Recommended: Win version, supports code prompts!

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)
