Secret Codes guide
Check For An iOS Update on iPhone: How It Works
By Muhammad Shahid · · 3 min read
Quick answer
Carrier and modem fixes often ship inside iOS updates. Baseband firmware — the software running your cellular modem — is delivered as part of iOS. Signal, VoLTE and 5G problems are regularly fixed in point releases, so checking for an update is a legitimate diagnostic step, not just housekeeping.
Secret CodesDial codes, SIM & network test · Free on the App StoreDownload free →| What it does | Carrier and modem fixes often ship inside iOS updates. |
|---|---|
| Published for | any iPhone |
| Type | iOS setting |
Carrier and modem fixes often ship inside iOS updates. This page explains what it does, how to use it on an iPhone and which carriers it applies to.
I build Secret Codes: IMEI & Carrier, a free iPhone app with 317 checked codes and guides, including this one. If you would rather tap than memorise, get Secret Codes on the App Store.
What is Check For An iOS Update?
Baseband firmware — the software running your cellular modem — is delivered as part of iOS. Signal, VoLTE and 5G problems are regularly fixed in point releases, so checking for an update is a legitimate diagnostic step, not just housekeeping.
How do I do it?
- Open the Settings app.
- Tap General, then Software Update.
- Install any update that is offered.
- Check Settings › General › About afterwards for a carrier settings prompt.
Which carriers does this apply to?
| Published for | any iPhone |
|---|---|
| Type | iOS setting |
| Good to know | Available on every iPhone. |
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- Force Restart Your iPhone
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- Allow Calls During Focus
See all iphone calling features or every category of iPhone codes.
How Secret Codes helps
Secret Codes keeps this and every other entry a search away. Pick your carrier once and each entry says whether it is published for your line. You can save favourites, add a private note, and record whether a code worked on your line.
Frequently asked questions
What is Check For An iOS Update on iPhone?
Carrier and modem fixes often ship inside iOS updates. Baseband firmware — the software running your cellular modem — is delivered as part of iOS.
What else should I know about Check For An iOS Update?
Signal, VoLTE and 5G problems are regularly fixed in point releases, so checking for an update is a legitimate diagnostic step, not just housekeeping.
What are the steps for Check For An iOS Update?
1. Open the Settings app. 2. Tap General, then Software Update. 3. Install any update that is offered. 4. Check Settings › General › About afterwards for a carrier settings prompt.
Where do I find Check For An iOS Update?
In the Settings app on your iPhone.
Is there a dial code for Check For An iOS Update?
No. On iPhone this is not a dial code, so you use the steps on this page instead.
Which carriers does Check For An iOS Update work on?
It is published for any iPhone. Available on every iPhone.
Does Check For An iOS Update work on Android phones too?
These steps are for iPhone. Android phones have their own menus.
Will Check For An iOS Update work outside the US?
The iPhone steps stay the same, although some features depend on your carrier and region.
What if Check For An iOS Update does not work on my iPhone?
Check that it applies to your carrier first, because carriers decide which services they offer and can change them. If it should apply to your line, contact your carrier.
What is related to Check For An iOS Update?
Force Restart Your iPhone. Recover an iPhone that has stopped responding.
What else is in this category?
Review Device Analytics. Read the raw diagnostic logs your iPhone keeps.
Can I find Check For An iOS Update in an app?
Yes. Secret Codes, a free iPhone app, includes it with its steps and carrier details.
Sources
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