Galaxy Added a New eSIM but Mobile Data Still Uses the Old Line

Adding a subscription and selecting it for mobile data are separate actions. Before editing APNs, identify which line is enabled and which line is the default for data. A new plan can be installed successfully while traffic still uses a different subscription with no allowance or no roaming entitlement.

Make the line selection visible

Use clear labels such as Home and Travel, then record the provider behind each one. Labels are conveniences you can change; they are not proof of plan features. Check the new product's inclusion of data, voice and SMS separately. A shop's successful QR installation demonstrates a downloaded profile, not every service entitlement.

Samsung's eSIM instructions describe installing a carrier plan through SIM manager. Prefer the controls actually displayed by your Galaxy and the current provider instructions. This article does not assume that every regional model exposes the same preferred-line or automatic-switching options.

Check the data route

In Settings → Connections, open SIM manager or the similarly named control on your software. Identify both subscriptions and ensure that the new one is enabled. Stop if you cannot confidently identify an entry; ask its issuer rather than deleting it.
Find the control for the preferred mobile-data subscription. Select the newly purchased data line when that is your intention. Do not change call and message preferences unless those services also need to move.
Turn Wi-Fi off briefly and load a small page. This checks cellular use rather than the hotel's internet. Avoid downloading an update or performing a large speed test before confirming which metered account is involved.
Check whether the data provider requires roaming for its specific product. A travel eSIM can use a partner network, but that does not authorize roaming on the home subscription. Apply the provider's instruction to the identified line only, after confirming charges.
If the chosen line still cannot load a page, contact its provider with the current model, software, selected line and service status. Ask for the official configuration or provisioning check. Do not paste APNs from a different product into the phone.

Read the outcome

If internet begins working when the new line is selected, the installed profile did not need replacement. If the old plan still records use, recheck any automatic data-switching feature that your phone actually offers and discuss it with the carriers. If neither line has internet with Wi-Fi off, investigate coverage and activation rather than relying on the line labels.

Differences worth checking

Dual-SIM behavior depends on hardware variant, firmware and carrier. A supported eSIM profile does not necessarily establish every simultaneous-line combination. The safest question for support is about the complete model code and two actual subscriptions, not merely “does Samsung support eSIM?”

Limits and warnings

Do not remove the home profile or cancel its plan as a way to force routing. Deleting profile data and ending a contract are different actions. Preserve a reliable connection for support, keep full identifiers private, and get clear pricing advice before permitting an unplanned line to use roaming data.