Alipay for Visitors: Keep Your Home Number and Use a China Data eSIM

Two lines, two jobs

Most visitors get confused because they think one phone line has to do everything. It does not. Split the work:

Line	Job on the trip
Your home SIM (physical or eSIM)	Receiving SMS: bank one-time codes, Alipay verification, anything tied to your home number
A China travel data eSIM	Mobile data: maps, ride-hailing, translation, the Alipay app itself, messaging apps

A China travel eSIM is data-only. It gives you a data connection; it does not give you a Chinese phone number and it does not receive SMS sent to your home number. That is exactly why the pair works: your home line stays in the phone for messages, and the eSIM carries the data so you are not paying your home carrier's roaming rate for every map tile.

If your phone is the bottleneck rather than the plan, check Is My Phone eSIM Compatible? before you buy anything, and if you are on a Samsung device, the Samsung mobile data checklist covers the line-selection settings you will need on arrival.

Before you fly: register and link a card

Do the account work at home, on your own Wi-Fi, where you can troubleshoot calmly.

1. Install Alipay from your phone's official app store.
2. Register with a number that can receive SMS. For most visitors that is their home mobile number. Use a number you will still have access to during the trip.
3. Complete identity verification if the app asks for it. Requirements differ by account and country; follow what the app shows you rather than a blog post from last year.
4. Link a card. Alipay's supported card list, identity requirements and any fees are set by Alipay and your bank, and they change. Check the current terms in the app before departure, and again before your first payment.
5. Keep your home SIM active for the trip if your bank sends codes by SMS to that number.

One practical note: if your home line is a physical SIM and your eSIM is the data plan, both can be active at once on most modern phones. If your home line is already an eSIM, you are adding a second eSIM profile — the same phone can usually hold both, with one selected for data.

Set the correct line for data

This is the step that trips people up at the airport. Your phone has two lines; only one should be carrying data, and it should be the travel eSIM.

• Data line: the China eSIM.
• Default voice line: your home SIM, so calls and SMS route normally.
• Data roaming on your home line: off, unless your home plan includes China at a price you have accepted.
• The eSIM line: leave it enabled.

The China eSIM plans on the China eSIM store are data-only, hotspot included, and start on first connection to a supported network — so you can install the eSIM at home and it will not start burning validity while you are still packing. Each plan names its network before you pay, so you can match the plan to the cities you are visiting rather than guessing.

If you want the wider picture on staying online in mainland China without a local SIM, eSIM China: Stay Online Without a Local SIM walks through the same decision from the data side.

Keep verification SMS reachable

Verification is the part visitors worry about most, and it is worth being precise about what is and is not guaranteed.

• SMS delivery depends on your home carrier's roaming agreements and your phone's settings. Nobody selling you a data eSIM controls that.
• If you turn your home SIM off entirely, you will not receive codes sent to it. Keep it enabled for messages even if you are not using it for data.
• If a code does not arrive, the usual fixes are: confirm the home line is enabled, confirm you have roaming coverage for SMS (not data), and wait a moment before requesting another code. Repeated requests can be rate-limited by the sender.
• Some services let you change the registered number later. If you plan a longer stay, decide early whether you want a Chinese number for anything, because that is a separate product from a travel data eSIM.

We cannot promise that a specific code will arrive, and neither can any eSIM seller. What you can do is keep the line that receives it switched on and reachable.

What to do when a payment fails

Payment acceptance is decided by Alipay, the merchant and your bank — not by your data connection. Still, a working data line removes one variable. Work through it in order:

1. Check you have data. Open a map or a web page. If nothing loads, fix the data line first: confirm the eSIM is selected for data and that you are in a covered area.
2. Check the app's current terms. Card support, verification status and any fees live inside the app. Read what it says today rather than what a forum said last year.
3. Check with your bank. Foreign-card blocks on overseas transactions are common. Your bank can confirm whether it declined the charge.
4. Try the merchant's other option. Many Chinese merchants also accept a second payment method; if one fails, the other may not.
5. Keep a backup. A second card, or a small amount of cash for the day, turns a payment failure into an inconvenience rather than a crisis.

If you are heading to a specific city first, the Shanghai eSIM guide covers paying easily once you are on the ground, and Does WhatsApp work in China? answers the messaging question that usually comes next.

What to buy, and when

Buy the China eSIM before you fly, install it at home, and leave it disabled until you land — or install it and let it activate on first connection, depending on the plan's stated trigger. Choose the data amount from your trip length and how much you will actually use maps, translation and ride-hailing. If you are unsure, How much data should you choose? is the short version.

A simple rule: a short city break with heavy map use sits comfortably in a per-day plan; a longer trip with laptop tethering wants a larger total or a per-day plan with a higher daily allowance. Every plan on the China store page states its network, data amount, validity and that hotspot is included, so the comparison is on the page rather than in a review.

Keep your home number for SMS. Put your data on the China eSIM. Do the account setup before departure. That is the whole workflow.