Secret Codes guide
iPhone 5G Is Slower Than LTE: How to Fix It
By Muhammad Shahid ยท ยท 5 min read
Quick answer
Why your 5G connection can genuinely be the slower one. This is usually real, not imagined, and it comes down to how much spectrum the connection actually gets.
Secret CodesDial codes, SIM & network test ยท Free on the App StoreDownload free โ| What it does | Why your 5G connection can genuinely be the slower one. |
|---|---|
| Published for | any iPhone, Verizon, AT&T, T-Mobile and UScellular |
| Type | iOS setting |
Why your 5G connection can genuinely be the slower one. 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.
Why does this happen and how do I fix it?
This is usually real, not imagined, and it comes down to how much spectrum the connection actually gets. Low-band 5G runs in narrow channels on 600 and 850 MHz โ the same airwaves that used to carry LTE โ and a narrow channel simply cannot carry much data no matter how modern the radio is. Mid-band 5G (T-Mobile's 2.5 GHz, and the C-band both Verizon and AT&T deployed) is where the large speed increases live.
Dynamic Spectrum Sharing makes it worse in some places. DSS lets a carrier run 5G and LTE inside the same carrier at the same time, which is how a 5G icon appeared nationwide so quickly, but the two technologies then share one block of spectrum and the 5G side gets only a slice of it.
Meanwhile mature LTE aggregates several carriers at once. An LTE connection combining three or four carriers can easily beat a single narrow low-band 5G channel. Forcing LTE is therefore a legitimate fix rather than a downgrade.
What should I try, in order?
- Run a speed test on 5G, then set Settings, Cellular, Cellular Data Options, Voice & Data to LTE and run the same test in the same spot.
- If LTE wins, leave it on LTE in that location. You are on a narrow low-band or DSS 5G carrier and LTE genuinely carries more data there.
- Check the indicator: 5G UW (Verizon), 5G UC (T-Mobile) or 5G+ (AT&T) means the faster mid-band or mmWave layer. A plain 5G icon usually means low-band.
- Set it back to 5G Auto when you leave. 5G Auto uses Smart Data mode, which drops to LTE when 5G would not be meaningfully faster and saves battery doing it.
- If plain 5G is consistently slower than LTE across your whole area, report it to your carrier with the speed-test figures. Only they can rebalance the spectrum split.
Which carriers does this apply to?
| Published for | any iPhone, Verizon, AT&T, T-Mobile and UScellular |
|---|---|
| Type | iOS setting |
| Good to know | 5G options appear on iPhone 12 and later with a 5G plan. Which 5G layer you get is decided by the carrier and your location, not by iOS. |
Related fix iphone phone problems
- Data Does Not Work But Calls Do
- 5G Icon Shows But Nothing Loads
- Calls Drop Constantly
- Carrier Name Missing From The Status Bar
- SOS Or SOS Only In The Status Bar
- iPhone Gets Hot And Loses Signal
See all fix iphone phone problems 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. This entry is part of Secret Codes Pro.
Frequently asked questions
What should I do about 5G Is Slower Than LTE?
Why your 5G connection can genuinely be the slower one. This is usually real, not imagined, and it comes down to how much spectrum the connection actually gets.
What else should I know about 5G Is Slower Than LTE?
Low-band 5G runs in narrow channels on 600 and 850 MHz โ the same airwaves that used to carry LTE โ and a narrow channel simply cannot carry much data no matter how modern the radio is. Mid-band 5G (T-Mobile's 2. 5 GHz, and the C-band both Verizon and AT&T deployed) is where the large speed increases live.
What are the steps for 5G Is Slower Than LTE?
1. Run a speed test on 5G, then set Settings, Cellular, Cellular Data Options, Voice & Data to LTE and run the same test in the same spot. 2. If LTE wins, leave it on LTE in that location. You are on a narrow low-band or DSS 5G carrier and LTE genuinely carries more data there. 3. Check the indicator: 5G UW (Verizon), 5G UC (T-Mobile) or 5G+ (AT&T) means the faster mid-band or mmWave layer. A plain 5G icon usually means low-band. 4. Set it back to 5G Auto when you leave. 5G Auto uses Smart Data mode, which drops to LTE when 5G would not be meaningfully faster and saves battery doing it. 5. If plain 5G is consistently slower than LTE across your whole area, report it to your carrier with the speed-test figures. Only they can rebalance the spectrum split.
Where do I find 5G Is Slower Than LTE?
Mostly in the Settings app, following the steps on this page in order.
Is there a dial code for 5G Is Slower Than LTE?
No keypad code is listed for it. The way to do it is: Fix.
Which carriers does 5G Is Slower Than LTE work on?
It is published for any iPhone, Verizon, AT&T, T-Mobile and UScellular. 5G options appear on iPhone 12 and later with a 5G plan. Which 5G layer you get is decided by the carrier and your location, not by iOS.
Does 5G Is Slower Than LTE work on Android phones too?
These steps are for iPhone. Android phones have their own menus.
Will 5G Is Slower Than LTE work outside the US?
The iPhone steps stay the same, although some features depend on your carrier and region.
What if 5G Is Slower Than LTE 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 5G Is Slower Than LTE?
Data Does Not Work But Calls Do. Full bars, calls and texts fine, but nothing loads.
What else is in this category?
5G Icon Shows But Nothing Loads. The status bar claims 5G while pages time out.
Can I find 5G Is Slower Than LTE in an app?
Yes. Secret Codes, a free iPhone app, includes it with its steps and carrier details, as part of Secret Codes Pro.
Sources
Secret CodesDownload free
