Can I keep my phone number with an eSIM?
Yes. A.R.I.A Mobile is a data-only eSIM, so your existing phone number stays on your primary SIM. You add A.R.I.A as a second line for data while calls, texts and WhatsApp continue arriving on your normal number.
Yes. A.R.I.A Mobile is a data-only eSIM, so your existing phone number stays on your primary SIM. You add A.R.I.A as a second line for data while calls, texts and WhatsApp continue arriving on your normal number.
Short answer
Yes. You keep your existing mobile number on your primary SIM. A.R.I.A Mobile is a data-only eSIM that runs alongside it.
How it works
Modern phones support two active SIM profiles at once (one physical + one eSIM, or two eSIMs):
- Primary SIM — your home number, used for calls, SMS and apps tied to that number (WhatsApp, iMessage, banking 2FA).
- A.R.I.A eSIM — carries data. WhatsApp, Teams, Zoom, FaceTime, Telegram, Maps and Email all run on it the moment you land.
This is the core idea behind A.R.I.A Mobile — a global eSIM connectivity platform for data-first communication, designed so you never lose your number.
Recommended settings
- Default voice line: Primary SIM
- Default data line: A.R.I.A eSIM
- Allow data switching: Off (prevents accidental roaming on your primary)
- Roaming on primary SIM: Off
People also ask
- eSIM vs roaming — which is cheaper?
For almost every trip outside the EU, a travel eSIM is dramatically cheaper. A typical UK carrier charges £6 per day for roaming data outside Europe — that's £84 for a two-week trip with a 500 MB daily cap. The same trip on an A.R.I.A Mobile eSIM is around £10-£20 for 10-20 GB of data, with no daily caps and no bill shock.
- Can I transfer my eSIM to a new phone?
In most cases an Aria Mobile eSIM stays tied to the device it was first installed on, so transferring it to a new phone is not automatic. If you change handsets mid-trip, contact our support team and we can usually issue a fresh QR code for the new device so you keep your remaining data without buying another plan.
- Can I use WhatsApp with an eSIM?
Yes. WhatsApp works perfectly on an A.R.I.A Mobile eSIM — messages, voice notes, voice calls and video calls all run on the data plan, while your original WhatsApp number stays linked to your primary SIM.
- How do data-only eSIMs work?
A data-only eSIM is a digital SIM profile that connects your phone to mobile internet without giving you a new phone number. You install it by QR code in 60 seconds and it powers all data apps — WhatsApp, Teams, Zoom, FaceTime, Maps and Email — while your original SIM keeps your number.