Technician helping troubleshoot Motorola phone screen brightness not working

Steve H.

Reviewed for technical accuracy

Specialities: Android cellular data issues on LG phones (LTE/5G shows but no internet), APN checks & resets, SIM/eSIM troubleshooting, data limits & roaming settings.

Mobile data stopped on your LG? Common reasons + what to check first (SIM, APN, data limit, roaming, network mode, outages)

Technician avatar Technician
Okay — let’s keep this simple and safe. When an LG phone has signal but mobile internet doesn’t work, it’s usually a setting or carrier detail, not anything you “broke.”

Trust moment: We’ll start with checks that don’t erase anything and won’t mess with your apps or photos.

First: when did it start — today, after a trip, after a software update, or after changing your SIM/plan?
Customer
It started this morning. I can make calls, but I can’t use the internet unless I’m on Wi-Fi. The LTE icon is there.
Technician avatar Technician
Thanks — that “calls work, data doesn’t” detail matters.

Quick symptom check (no changes yet):
• Do you ever see a small ! near LTE/4G/5G?
• Can you send a picture message (MMS), or does that fail too?
• Does it work in one place (outside) but not inside your home?
Customer
I sometimes see an exclamation mark. MMS also didn’t send. And it’s the same everywhere I tried.
Technician avatar Technician
If MMS fails too, that often points to the phone not getting the right carrier data settings (APN) or a plan/limit issue.

Two very safe checks first:
1) Confirm Airplane mode is OFF (even briefly toggling it can refresh the connection).
2) Confirm Mobile data is ON for your SIM, and Data Saver isn’t blocking background data.

Trust moment: Don’t do a “factory reset.” We don’t need anything extreme to diagnose this.
Customer
Airplane mode is off, mobile data is on. I did try turning airplane mode on and off once, but it didn’t help.
Technician avatar Technician
Good — that rules out the obvious toggles.

Next question (it’s a common “false alarm”): did you get any text from your carrier about a data limit, a payment issue, or a plan change? Sometimes calls still work even when data is restricted.

Also, are you using one SIM or two (or an eSIM + SIM)?
Customer
Just one SIM. I didn’t get any messages about limits. My plan should be fine.
Technician avatar Technician
Understood. Then we look at the “carrier settings” side without doing anything risky.

On many LG phones, this is the key clue: if the APN is wrong or missing, the phone may show LTE/5G but still have no usable internet and MMS will fail.

Before changing APN entries, a gentle check: in your Mobile Network settings, do you see an Access Point Names section? And does it show your carrier’s name, or something blank/odd?
Customer
I found Access Point Names. I see one listed, but I’m not sure if it’s correct. I’m afraid to touch it.
Technician avatar Technician
That caution is smart. Editing the wrong fields can create more confusion, especially with MMS.

Trust moment: I don’t want you guessing values or copying random settings from the internet.

Here’s a safe way to learn something without “changing things”:
• Is there an option like Reset/Restore default APN? (Don’t tap yet — just confirm if it exists.)
• Does your APN list show multiple options, or only one?
Customer
There’s a “Restore default settings” option. It only shows one APN.
Technician avatar Technician
That’s useful. “Restore default APN” is often the least risky way to get back the carrier’s expected settings (it typically doesn’t erase photos or apps).

One more environment question before you do anything: did you travel recently, switch countries, or toggle Data roaming? If roaming is off, data can look “dead” outside your home area.
Customer
No travel. I’m at home. Roaming is off, but it’s always been off.
Technician avatar Technician
Great — then roaming probably isn’t the cause.

Another common “it started suddenly” trigger is network mode. If it’s set to something unusual (for example, 3G only, or a forced 5G mode that isn’t stable in your area), data can fail while calls still work.

Can you see a setting like Preferred network type (LTE/3G/2G or 5G/4G/3G)? Just tell me what it’s set to — no need to change it yet.
Customer
It says 5G/4G/3G/2G (auto). So it seems normal.
Technician avatar Technician
Auto mode is usually the right choice, so we can leave that alone.

At this point, the most likely buckets are:
• Carrier issue/outage in your area
• APN settings not matching your SIM/plan
• A SIM problem (rare, but possible even if calls work)

A safe comparison test: do you have access to another phone to briefly test your SIM (or a family member’s SIM to test in your LG)? You don’t need to do it now — it’s just a clean way to separate “SIM vs phone vs carrier.”
Customer
I could try my spouse’s phone later. For now I just need to know what not to do so I don’t make it worse.
Technician avatar Technician
That’s the right mindset. Here’s what to avoid while you diagnose:
• Don’t keep re-trying dozens of times — it doesn’t “push it through,” it just adds confusion.
• Don’t install random “signal booster” apps (they can’t fix carrier settings).
• Don’t factory reset unless you’ve confirmed it’s truly needed (it’s almost never the first step).

The safest next move is to write down what you see (LTE with “!”, MMS failing, APN restore option present). Then you can do one controlled test: either restore default APN or a quick SIM swap test — just one change at a time so the result is clear.
Customer
That helps a lot. I’ll do one careful step at a time and test the SIM in another phone. Thank you.

Quick answer: the accepted fix

Accepted first approach for LG mobile data not working: confirm it’s not a simple toggle or limit, then gather “clean clues” (MMS behavior, APN status, network mode) before making bigger changes.

What usually helps most (safe checks):
• Toggle Airplane mode once and confirm Mobile data is enabled for the correct SIM (no repeated retries).
• Check whether MMS fails too — if it does, carrier settings (like APN) become a strong suspect.
• Look for an option to Restore default APN (use official carrier guidance, not random values).
• Verify Preferred network type is set to Auto and you’re not stuck on a limited mode.
• If possible, do a brief SIM comparison test (SIM in another phone / another SIM in your LG) to separate SIM vs phone vs carrier.


Why an iPhone stops charging (and why it can start suddenly)

Most “sudden” iPhone not charging cases come down to a simple change: a worn cable, a weak adapter, lint in the port, or a wireless pad that loses alignment. It can also happen after an iOS update when the phone runs background tasks, warms up, or behaves differently for a day or two. Another common reason is protection: if the iPhone detects moisture in the Lightning/USB-C connector or the phone gets too hot, charging can pause. If charging consistently stops around 80%, it may be a normal battery protection feature rather than a failure.

What to check first: cable vs port vs wireless pad vs iOS settings

Start with safe comparisons. Test a different outlet and power adapter, then try a different cable if possible. If wired charging shows nothing at all (no sound, no bolt), look for a loose fit or lint in the port and consider a wireless “comparison test” (MagSafe/Qi) with the case removed. If the iPhone charges wirelessly but not by cable, the issue is usually the cable/adapter/port contact. If it charges but pauses at 80% or says “charging on hold,” settings like Optimized Battery Charging, heat, or background activity may be involved.

iPhone not charging — gentle troubleshooting tips for seniors

Most charging problems are cable/adapter wear, lint in the port, moisture alerts, heat protection, or a wireless pad alignment issue.

Best approach: change one thing at a time. Start by comparing a different outlet and power adapter, then try a known-good cable. Check the port with a light for obvious lint and avoid sharp tools. If wireless charging works (especially with the case off) but the cable doesn’t, that’s a strong clue. If the phone shows a moisture warning, stop charging and let everything dry naturally.

Disclaimer: This information is AI-generated and intended for general guidance only. Avoid making multiple system changes at once. For device-specific steps, consult a verified expert on Whizz-Tech or the manufacturer’s support before making decisions.

Additional troubleshooting options


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FAQ

Why does my LG show LTE/5G but mobile data won’t load anything?

This can happen when the phone has signal but the data connection isn’t fully set up. A missing/incorrect APN, a carrier outage, or a plan restriction can cause it. If MMS also fails, carrier settings are a strong clue. Try one safe check at a time so you can see what changes.

Did this start after an update or settings change?

It can. Updates sometimes reset network-related preferences or trigger a carrier settings refresh. It’s also common after changing a SIM, switching plans, or a carrier maintenance window. Start with the safest checks (Airplane mode toggle, mobile data enabled, network mode on Auto). Avoid making many changes at once.

Is this a SIM problem or a phone problem?

A quick comparison test helps. If your SIM also has no data in another phone, it points to SIM/plan/carrier. If another SIM works in your LG, the carrier settings on your line may be the issue. Calls working doesn’t always mean data is healthy. Write down what you see (like a “!” icon or MMS failing).

Can I check and fix this safely at home?

Yes, for basic diagnosis. Safe steps include checking that mobile data is on, confirming network mode is Auto, and reviewing APN options (especially “Restore default”). If you’re unsure, avoid typing in APN values from random sites. If symptoms persist across locations and after a controlled test, your carrier may need to confirm account or network status.

Sources

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