No 5G with your eSIM: is it the plan, phone, or coverage?

If 4G or LTE works, your eSIM is active. Five conditions must all be met for 5G: your plan, the local network partner, your exact phone model, the network setting, and coverage at your location. If one condition is missing, your phone will stay on 4G.

HolySim advice: test speed and stability, not just the icon. Good 4G can be more useful than weak indoor 5G.

4G does not mean the eSIM is faulty

A working 4G connection proves that installation, network registration, and mobile data are largely in order. Do not delete the profile or scan a new QR code.

With Wi-Fi switched off, open a website and, if useful, run one speed test. If the internet does not work, you have a broader data problem and should follow the troubleshooting steps for no internet after installation. If data works, limit the diagnosis to 5G.

Check whether your plan includes 5G

A local network can offer 5G without giving your travel eSIM access to it. The network partner, technical roaming agreement, and product configuration together determine which network technology is available.

Look for 5G in the details of your exact HolySim plan. If only 4G/LTE is listed or 5G is not mentioned, do not expect 5G. Another plan for the same country may have different conditions.

An unlimited data plan says nothing about 5G. That word refers to the amount of data or the fair-use policy, not automatically to the radio technology.

Check your exact phone model

The phone must have 5G hardware and support the frequencies used by the local partner network. A model name with regional variants may use different frequency bands in one market than in another.

For 5G on iPhone, Apple lists a supported device, a 5G carrier, and a 5G cellular plan as separate requirements. On Android, check the full model code on the manufacturer's support page.

A software update can improve network support, but it cannot turn a 4G phone into a 5G phone.

Set the preferred network mode correctly

On iPhone, open Settings > Cellular > your eSIM > Voice & Data. Select 5G Auto or 5G On if those options are available. 5G Auto can switch back to 4G to save battery when 5G offers little advantage.

On Android, the setting is usually under Network & internet > SIMs > your eSIM > Preferred network type. Samsung often uses Connections > Mobile networks > Network mode. Select a mode that includes 5G.

If the 5G option is missing entirely, the phone, software, active carrier configuration, or plan may not offer 5G. A manual APN will not add the option.

Test in another location

5G coverage is local. A carrier's coverage map is not a guarantee for every hotel room, train, or street. Higher frequencies can weaken more quickly indoors, causing the phone to use 4G for a more stable connection.

Test outside in an open area, switch airplane mode on for fifteen seconds, and switch it off again. Wait a few minutes. You can compare the result with a phone on the same partner network, but remember that it may have a different plan and model.

Network management can also temporarily keep you on 4G in busy places. The choice is not based on signal strength alone.

Check battery and data mode

Low Power Mode or Battery Saver can limit 5G on some phones or in certain situations. Temporarily turn it off and test again. Turn it back on afterward if battery life matters more to you than the 5G icon.

On iPhone, also check the selected data mode. It controls how much data certain features may use over 5G, but it does not replace a 5G plan. On Android, Data Saver and device optimization can limit background traffic without completely disabling 5G access.

Do not change developer options or service menus. Incorrect band settings can reduce coverage and may be difficult to reverse.

5G with Dual SIM

Check that the travel eSIM is selected as the mobile data line. The 5G indicator belongs to the line currently providing data. The control center or SIM manager shows which line is active.

Older software or certain phone combinations may handle Dual SIM and 5G differently. Update the phone and, if necessary, test briefly with the other line switched off. Do not remove that other SIM; disabling it is enough and is reversible.

Manual network selection rarely helps

Leave network selection on automatic. The eSIM can then choose an approved partner. Manually selecting a carrier with 5G in its name does not provide access if your plan has no agreement with that network.

Only choose a different partner when HolySim lists it as supported. Test again outdoors afterward and check whether mobile data still works.

When 4G is the right outcome

Stable 4G is more than adequate for maps, messaging, tickets, translation, and normal browsing. 5G can help with large downloads, high upload speeds, or busy networks, but it may use more battery and is not always more stable.

Do not buy a second eSIM just to change an icon. First check whether the current speed is actually limiting how you use data on your trip.

When to contact support

Contact support if your plan explicitly promises 5G, your phone supports the local bands, 5G is enabled in the settings, and you still receive only 4G at an outdoor location with coverage. Send:

• your order number and plan name;
• the exact phone model code and software version;
• the location and time of the test;
• the selected network mode;
• the name of the visible carrier;
• a screenshot of the status bar and eSIM settings.

Support can then check whether 5G is enabled for the profile and partner network.

Sources and editorial review

The device requirements were checked against information from Apple and Google. 5G access, roaming agreements, frequencies, and coverage vary by country, partner, and plan. Current product details and manufacturer information therefore take precedence over general expectations. Last substantively reviewed on July 15, 2026.