Do I get a new phone number with a travel eSIM?

Most travel eSIMs are data-only, so you do not get a new phone number. Your existing number stays on your home SIM, and apps such as WhatsApp and iMessage keep working with your usual number over the eSIM data connection. Some plans include a local number, which is shown in the plan details.

Does an eSIM work without Wi-Fi?

Yes. Once installed, an eSIM connects to mobile networks just like a physical SIM. You only need an internet connection once, during installation, which is why installing on Wi-Fi before departure is recommended. After that, the eSIM provides its own mobile data.

Does an eSIM use more battery than a physical SIM?

No. An eSIM uses the same radio hardware as a physical SIM, so battery use is the same. Keeping two lines active at once can use slightly more power, but that applies to any dual SIM setup, not to eSIM specifically.

An eSIM is at least as secure as a physical SIM. It is built into the device, so it cannot be removed or stolen if your phone is lost, and eSIM profiles are delivered through the GSMA remote provisioning standard used by carriers worldwide.

What are the disadvantages of an eSIM?

The main limits are device support and transfers. You need a compatible, carrier-unlocked phone; moving an eSIM between devices is harder than swapping a plastic card; and many travel eSIM QR codes can only be installed once. Check your device compatibility before buying.

Can I use an eSIM and my physical SIM at the same time?

Yes. On dual SIM phones, both can be active together. A common travel setup is mobile data on the eSIM and calls or texts on your home SIM. Turn off data roaming on the home SIM to avoid roaming charges.

How many eSIMs can one phone store?

Most eSIM phones can store several profiles, with one or two active at the same time. Exact limits vary by model, so you can keep eSIMs for different destinations on the same phone and switch between them in settings.

What happens if I delete my eSIM?

Deleting an eSIM usually removes it permanently. Most travel eSIM profiles cannot be reinstalled after deletion, so keep the eSIM installed until your trip and plan are finished. Contact your provider before deleting if you are unsure.

Do eSIMs work on tablets and smartwatches?

Yes, on cellular models that support eSIM. Many iPads, Android tablets, and cellular smartwatches can use an eSIM for mobile data. Check the specifications of your exact model first, because Wi-Fi-only versions do not support any SIM.

What is a travel eSIM?

A travel eSIM is a prepaid eSIM data plan for a specific destination or region. Unlike a long-term carrier contract, you buy it online before a trip, it typically activates when you first connect at your destination, and it expires at the end of the validity period.

什么是 eSIM？

ByteSIM eSIM 指南

什么是eSIM?

eSIM，或嵌入式SIM，是内置于您的手机、平板电脑或智能手表中的数字SIM。您无需插入塑料SIM卡，而是下载移动运营商配置文件，将其安装到您的设备上，并在到达时连接到蜂窝网络。

了解eSIM与物理SIM卡的比较，旅行eSIM的工作原理，如何检查兼容性，以及购买前需要了解的事项。

更新于2026年7月适合初学者的指南

浏览eSIM目的地检查设备兼容性

基于4,000+客户评价
MIA 2026决赛入围者最佳eSIM提供商

扫描。安装。连接。

9:41

‹添加eSIM

扫描二维码

将您的运营商的二维码放置在框架内。

无法扫描？手动输入详细信息

ByteSIM eSIM 数字配置文件

扫描以安装
购买后立即交付

不需要物理SIM卡

eSIM 和实体 SIM 卡在设置、灵活性、通话和短信、设备支持以及可持续性方面的比较。
特性	eSIM 数字	实体 SIM
形式	下载到您设备的数字计划	可拆卸塑料卡
购买和设置	在线购买，然后扫描二维码或通过应用安装	在商店购买或等待送货，然后使用弹出工具插入
切换计划	保存多个计划并在手机设置中切换	手动更换卡片
丢失和损坏	没有松散的卡片可以丢失或损坏	可能会丢失、弯曲或损坏
双 SIM 使用	在使用旅行数据时保持您的家庭 SIM 活动	需要第二个 SIM 插槽或 eSIM
通话和短信	大多数旅行 eSIM 仅限数据；保留您的家庭 SIM 用于通话和短信	通常包括本地号码；通话和短信取决于计划
设备支持	需要兼容 eSIM 的解锁设备	在带有 SIM 托盘的手机中工作
可持续性	没有塑料卡或实体交付	塑料卡和包装