Device compatibility
Does the Xiaomi 15 Ultra support eSIM?
The Xiaomi 15 Ultra is what decides whether a travel eSIM installs, not the Xiaomi name on the box. Storage, radio and market variant all change from one model to the next, so every figure below was checked on this model.
5
Profiles stored
2
Active at the same time
2025
Released
40
Seconds to install, median
What the Xiaomi 15 Ultra does with a travel eSIM
The Xiaomi 15 Ultra is a phone, so the travel profile is a data line and your existing line stays the voice line. Calls and texts to your usual number keep arriving while Orbislo carries the browsing.
Installing writes the profile. Nothing is spent until it attaches to a network at the destination, so an install three weeks early costs exactly the same as one at the gate. Do it at home, on wifi, while you still have a connection to fix anything.
Storage and active lines
The Xiaomi 15 Ultra holds 5 profiles, which is at the low end of everything we have checked. Delete the dead profiles from old trips before you install, or the sheet will simply refuse.
Active is how many lines run at the same time, and on the Xiaomi 15 Ultra that is 2. Storage is how many profiles sit on the device waiting, and that is the number that runs out without warning.
Each destination's line installs in one tap from the Orbislo app, and while it is valid every refill lands on that same line. Most of Europe runs on a single line, so a trip through several neighbouring countries takes one slot rather than one per country.
- Home line: calls and texts, so bank codes still arrive on your usual number.
- Orbislo line: mobile data, with roaming switched on.
- Automatic data switching: off, or the phone borrows the expensive line in a tunnel.
5G on the Xiaomi 15 Ultra, and where it will not appear
The Xiaomi 15 Ultra has a 5G radio and the travel profile uses it. Where a partner network runs 5G, you get 5G, on the same profile and at no extra cost.
88 of our 197 destinations are 4G only on the networks we buy from. On those the icon reads LTE whatever the handset can do, and no setting changes it.
Speed belongs to the network rather than to the profile.
What goes wrong on the Xiaomi 15 Ultra, and the fix
Data roaming has to be switched on for this line. Your profile is issued outside the country you are standing in, so the device treats every attachment as roaming. Leave it off and the Xiaomi 15 Ultra finds a network and then refuses to use it.
If the profile will not download at all, the order refunds automatically inside 60 seconds, with no ticket. Install again from the same order, because the profile is reissued to your account rather than lost.
On this device the sequence is Settings, Network and internet, SIMs, the Orbislo line, Roaming on. Then set Orbislo as the SIM for mobile data and turn off automatic data switching.
- No service on the Orbislo line: roaming is off on that line.
- Connected but nothing loads: mobile data still points at the home line.
- Works, then stops after an hour: automatic data switching moved you back.
- Still searching: airplane mode on for 20 seconds, off, then restart.
Your SIM tray, and tethering
Your physical SIM stays exactly where it is. Adding an eSIM does not touch the tray, does not wipe the card and does not need it taken out. Remove it and you lose your own number, which is the opposite of the point.
Tethering is included on every Orbislo plan at no extra charge. The Xiaomi 15 Ultra can share the travel data with a laptop, a tablet or a watch, and nothing behind the hotspot needs a profile of its own.
What an Orbislo plan does once it is installed
Data never expires. A gigabyte you do not use in Lisbon is still there in Bangkok next year, metered plans have no throttle, and every customer gets 100 MB of free rescue data once a month on the line in use when the balance runs out. Unlimited runs full speed to 2 GB a day and then 1 Mbps.
One balance pays in all 197 destinations, and most of Europe runs on a single line, so a rail trip through three neighbouring countries is one install and one balance rather than three of each. Refills arrive on the line you already have, with no new plan or expiry date. Where a destination has more than one partner network, the line can move between them without you touching a setting.
How to install a travel eSIM on the Xiaomi 15 Ultra
- Open the Orbislo app and tap Install
- Confirm the eSIM download prompt
- Settings, Network and internet, SIMs, select Orbislo
- Turn on Roaming and set Orbislo as the SIM for mobile data
Data roaming sounds like it will cost you money. On the Orbislo line it cannot, because it is how that line reaches partner networks abroad and there is no charge beyond the data you already bought.
The Xiaomi 15 Ultra at a glance
| Specification | Xiaomi 15 Ultra |
|---|---|
| Takes an eSIM | Yes |
| Profiles stored | 5 |
| Active at the same time | 2 |
| 5G on partner networks | Yes, where the network runs it |
| Physical SIM tray | Yes, and it keeps working |
| Voice on the travel line | Data only |
| Tethering | Included, no extra charge |
Stored is how many profiles the device keeps. Active is how many run at the same time. Checked on this model rather than assumed from the brand.
Xiaomi 15 Ultra eSIM questions
Does the Xiaomi 15 Ultra support eSIM?
How many eSIMs can the Xiaomi 15 Ultra hold?
Will I lose my own number?
Do I have to turn roaming on?
Can I install before I fly?
Does tethering work on the Xiaomi 15 Ultra?
Pick the destination, then install its line in one tap
Take the metered wallet for maps and messaging, because the balance never expires. Take unlimited if you tether a laptop or stream, and read the 2 GB a day figure before you do.
The Xiaomi 15 Ultra by market
- Global markets: The global Xiaomi 15 Ultra takes two nano-SIM cards, one nano-SIM plus one eSIM, or two eSIMs. A traveller can keep a home SIM card in the tray and add a travel eSIM, or run a home eSIM and a travel eSIM with the tray empty.
- Taiwan (25010PN30G): The Xiaomi 15 Ultra sold in Taiwan is model 25010PN30G. Its spec sheet lists two nano-SIMs, nano-SIM plus eSIM, or two eSIMs, so a travel eSIM can go in beside a nano-SIM or beside a second eSIM.
- Hong Kong: Xiaomi Hong Kong lists its Xiaomi 15 Ultra with nano-SIM plus eSIM and eSIM plus eSIM options, as well as two nano-SIMs. A phone bought in Hong Kong can therefore take a travel eSIM for trips abroad.
- India: Xiaomi India lists the Xiaomi 15 Ultra with two nano-SIMs or one nano-SIM plus one eSIM, and does not list a two-eSIM option. On an Indian unit, plan to run a travel eSIM next to a physical SIM card in the tray.
- Japan: Xiaomi Japan sells the Xiaomi 15 Ultra with dual SIM support covering nano-SIM plus nano-SIM, nano-SIM plus eSIM, and eSIM plus eSIM, so the Japanese model accepts a travel eSIM in each of those layouts.
- China mainland: The Xiaomi 15 Ultra sold in China mainland lists two nano-SIM slots and no eSIM. A travel eSIM cannot be installed on this version, so owners of a China model need a local physical SIM card at their destination.
Networks on the Xiaomi 15 Ultra
- The global Xiaomi 15 Ultra supports standalone 5G on bands including n1, n3, n7, n8, n20, n28, n38, n41, n71, n77, n78 and n79, and LTE bands including 1, 3, 7, 8, 20, 28 and 71. No mmWave 5G band is listed.
- The China mainland Xiaomi 15 Ultra adds 5G bands n80, n81, n83, n84 and n89 and LTE band 34, but it does not list 5G bands n25, n71 or n75, or LTE bands 13, 25, 32 and 71.
- On the China mainland Xiaomi 15 Ultra, Tiantong satellite communication is supported, and a dual-satellite edition adds BeiDou satellite messaging. Both need the matching service opened with the satellite operator, and real use depends on that operator's deployment.
- The Indian Xiaomi 15 Ultra lists 5G bands n28A and n28B separately, together with n71, n77, n78 and n79, and LTE bands 28A, 28B and 71. Its wireless section lists Wi-Fi 6 and Bluetooth 6.0.
- On the China mainland Xiaomi 15 Ultra, both SIMs can be active on calls only on some 5G plus 5G and 5G plus 4G band combinations in standalone mode, and actual use depends on each operator's network.
- Xiaomi notes that eSIM on the Xiaomi 15 Ultra needs a wireless service plan, that such a plan may restrict switching providers or roaming even after the contract ends, and that eSIM availability varies by country, region and carrier.
Worth knowing about the Xiaomi 15 Ultra
- Xiaomi's steps for adding an eSIM run through Settings, then SIM cards and mobile networks. Switch on Use eSIM, open Manage eSIM, tap Add mobile plan, and scan the QR code the provider sent. The operator must support eSIM for the plan to activate.
- Xiaomi's Security Center lists 1 March 2031 as the security update end date for the Xiaomi 15 Ultra, and the phone is scheduled to receive security patches until that date.
- The global Xiaomi 15 Ultra ships with Xiaomi HyperOS 2, supports 4x4 MIMO on mobile data, and lists dual-frequency GPS on L1 and L5 along with Galileo, GLONASS, BeiDou, QZSS and NavIC for positioning.
- Hong Kong's Xiaomi 15 Ultra lists standalone 5G bands including n1, n3, n28, n71, n77, n78 and n79, with LTE bands 1, 3, 7, 8, 20, 28 and 71 among others, and no mmWave band.
What the Xiaomi 15 Ultra holds
- eSIM profiles it can store
- 5
- Active at the same time
- 2
- Released
- 2025
- Form factor
- Phone
- Network generation
- 5G capable where the network carries it
- Physical SIM tray
- Has a tray as well as eSIM