Does OnePlus 15 have eSIM?

Yes, OnePlus 15 supports eSIM in addition to physical SIM cards.

The SIM setup is:

• Nano-SIM + Nano-SIM + eSIM

• With a maximum of two lines active at the same time

So you can run:

• One physical SIM + one eSIM

• Two physical SIMs

• Or eSIM-only, with both physical SIMs disabled

This gives you flexibility to pair your home line with a local or travel data line on the same device.

Is OnePlus 15 eSIM-only?

No. Unlike some newer phones that removed the SIM tray completely, OnePlus 15 keeps a dual nano-SIM tray and adds eSIM on top.

In practice this means:

• You still get a classic, removable SIM tray

• You can swap physical SIMs whenever you like

• You can add an eSIM for data or a second number without touching the tray

It is an eSIM-capable phone, not an eSIM-only phone.

Does OnePlus 15 support dual SIM and eSIM together?

Yes, but with a limit.

The configuration is Nano-SIM + Nano-SIM + eSIM (max 2 at a time).

That means the phone can store:

• Two physical SIMs in the tray

• At least one eSIM profile in software

But the modem only allows two active lines at once, for example:

• SIM 1 (physical) + SIM 2 (physical)

• SIM 1 (physical) + eSIM

• SIM 2 (physical) + eSIM

You can’t keep three numbers active in parallel, even though the hardware holds three SIM identities.

Can OnePlus 15 use eSIM as the main line?

Yes. In Android’s SIM settings you can set the eSIM as the default line for:

• Mobile data

• Voice calls

• SMS

Once your eSIM is activated, you can:

• Use eSIM as the primary data line

• Keep a physical SIM as a backup or for local calls

• Or keep your physical SIM as the main number and let eSIM handle all travel data

This works especially well if you want to keep your personal number on a physical SIM and assign roaming-friendly data to the eSIM.

Does OnePlus 15 support 5G on eSIM?

OnePlus 15 is a full 5G device, with support for GSM, HSPA, LTE and 5G across a wide range of bands.

In general, manufacturers do not restrict 5G to physical SIMs only. As long as:

• Your carrier supports 5G on eSIM

• Your specific OnePlus 15 variant includes the right bands for that carrier

You can expect 5G data on the eSIM as well. If 5G on eSIM is critical, it is always wise to confirm with your local operator.

eSIM Specs and Regional Differences

From current specifications, the OnePlus 15 SIM section typically looks like this:

• SIM: Nano-SIM + Nano-SIM + eSIM (max 2 at a time)

• Network: GSM / HSPA / LTE / 5G

Some regional variants may be listed as Nano-SIM + Nano-SIM only, which usually indicates a non-eSIM model for specific markets.

In practice this means:

• Many global and European models advertise eSIM support

• Some markets may offer a dual-SIM-only version

• Checking the SIM section and model code on the box or retailer listing is important if eSIM is a must-have

Why Roamless eSIM is a Great Match for OnePlus 15

The OnePlus 15’s SIM design pairs naturally with Roamless.

• Keep your main number, add Roamless for data

  • Run your home line on a physical SIM and install Roamless on the eSIM for travel data. You stay reachable on your regular number while your data uses a separate profile.

• Single Global eSIM™ across 200+ destinations

  • Roamless uses one global eSIM that works in over 200 countries and regions, so you do not have to keep installing new profiles for every trip.

• Flexible ways to pay for data

  • RoamlessFlex lets you top up a wallet and pay per GB, with credit that does not expire.

  • RoamlessFix offers country and region based data plans if you prefer fixed bundles for specific trips.

• 4G/5G-ready where networks support it

  • OnePlus 15’s 5G modem and modern radio stack align with Roamless 4G and 5G capable data in supported destinations.

• Ideal for frequent border crossing

  • Because Roamless keeps the same eSIM active in many destinations, you can move between countries while the OnePlus 15 automatically reconnects to available partner networks.

OnePlus 15 SIM and eSIM Overview

OnePlus 15 eSIM FAQ

Can I use two numbers at once on OnePlus 15?
Yes. You can have up to two active lines at the same time:

• Two physical SIMs, or

• One physical SIM plus eSIM

You cannot have three lines active simultaneously.

Can I disable the physical SIMs and use only eSIM?
Yes. You can turn off both physical SIMs in the SIM settings and operate the phone purely on eSIM for data, calls and SMS, depending on what your provider supports.

Is eSIM on OnePlus 15 locked to one carrier?
That depends on where you buy the phone:

• Unlocked, open market models generally support eSIM from any compatible provider, including Roamless and local carriers

• Carrier branded models may restrict eSIM activation to that carrier or its partners

If you plan to rely on eSIM, confirm this with the retailer or carrier before purchase.

Can I keep my home number active while using Roamless on OnePlus 15?
Yes. This is one of the most practical setups:

• Keep your home number on a physical SIM for calls, SMS and messaging apps

• Install Roamless on the eSIM and set it as the default data line when you travel

Your contacts can keep using your regular number, while your data rides on Roamless pay as you go or fixed plans.

Do I need Wi-Fi to install a Roamless eSIM on OnePlus 15?
You need an internet connection for the initial eSIM download and activation. This can be Wi-Fi or mobile data. After installation, your OnePlus 15 can use mobile data from Roamless itself.

Sources:

https://www.oneplus.com/15/specs
https://www.gsmarena.com/oneplus_15_5g-14206.php