--- title: "eSIM APN: what it is and how to set it up | Gigapass" description: "You hardly ever need to, and when you do, nothing browses at all. What the APN is, where to change it, and why it isn't the eSIM's server address." url: https://getgigapass.com/en/blog/esim-apn-settings markdown: https://getgigapass.com/en/blog/esim-apn-settings.md lang: en site: Gigapass generated: 2026-10-24 languages: es: https://getgigapass.com/blog/esim-y-apn-cuando-hay-que-tocarlo de: https://getgigapass.com/de/blog/apn-esim it: https://getgigapass.com/it/blog/apn-esim fr: https://getgigapass.com/fr/blog/apn-esim pt: https://getgigapass.com/pt/blog/apn-esim nl: https://getgigapass.com/nl/blog/apn-esim ja: https://getgigapass.com/ja/blog/esim-apn ko: https://getgigapass.com/ko/blog/esim-apn zh-hans: https://getgigapass.com/zh-hans/blog/esim-apn pl: https://getgigapass.com/pl/blog/apn-esim sv: https://getgigapass.com/sv/blogg/apn-esim no: https://getgigapass.com/no/blogg/apn-esim da: https://getgigapass.com/da/blog/apn-esim tr: https://getgigapass.com/tr/blog/esim-apn ru: https://getgigapass.com/ru/blog/apn-esim zh-hant: https://getgigapass.com/zh-hant/blog/esim-apn ar: https://getgigapass.com/ar/mudawana/nuqtat-al-wusul-esim he: https://getgigapass.com/he/blog/apn-esim index: https://getgigapass.com/llms/en.txt --- # An eSIM's APN: what it is and when you have to touch it > You hardly ever need to, and when you do, nothing browses at all. What the APN is, where to change it, and why it isn't the eSIM's server address. [Home](https://getgigapass.com/en) › [Blog](https://getgigapass.com/en/blog) › An eSIM's APN: what it is and when you have to touch it How it works You hardly ever need to, and when you do, nothing browses at all. What the APN is, where to change it, and why it isn't the eSIM's server address. **Bea Nogales** 10 Aug 2026 5 min Photo by Ralf Leineweber on Unsplash In this article › When you have to touch it › Don't confuse it with the eSIM's server address › Where to change it The APN is the access point name: the internal address telling your phone how to get out to the internet within the operator's network. It sounds technical and in practice it's a text field that almost always fills itself in. ## When you have to touch it - When the plan you bought says so explicitly in its instructions. - When the line shows as registered on a network, with signal, and still doesn't browse at all. - When you've moved the profile to another phone and it has lost its settings. Outside those three cases, touching it is more likely to break something than to fix it. ## Don't confuse it with the eSIM's server address They're two different things that look alike on screen and have nothing to do with each other: the server address is for DOWNLOADING the profile when you install it, and the APN is for BROWSING once it's installed. Putting one where the other goes is a classic mistake, and it leaves the installation working and the data dead. What each one is at install time is in [an eSIM's QR code](https://getgigapass.com/en/blog/esim-qr-code). ## Where to change it 1. On iPhone: Settings, Mobile Data, the eSIM's line, Mobile Data Network. 2. On Android: Settings, Connections or Network & internet, the relevant SIM, Access Point Names. 3. Create a new one with whatever the plan's instructions say and set it as active. 4. Then restart the phone, which genuinely helps with this one. On some phones the option is hidden while the line is switched off: you have to switch it on first. Write down the APN that was there before you change it. If the new one doesn't work, going back to the old one is the quickest way to put things as they were. Know where you're going? Pick your destination, days and data. Install it before you leave and pay once. [See destinations](https://getgigapass.com/en#destinos) Bea NogalesDevices and compatibility She has been repairing phones since before eSIMs existed. She explains what a handset does inside without it sounding like a manual. ## Frequently asked questions **What is the APN?** The access point: the setting that tells your phone how to get out to the internet within the operator's network. **Do I have to configure it with an eSIM?** Hardly ever: it fills itself in. Only if the plan says so, or if the line registers on a network and still won't browse. **Is it the same as the server address?** No. That one is for downloading the profile when you install it; the APN is for browsing afterwards. **Where do I change it?** On iPhone, under Mobile Data and Mobile Data Network. On Android, in the relevant SIM under Access Point Names. ## Keep reading - [How it works](https://getgigapass.com/en/blog/move-esim-to-new-phone) | Changing phone with an eSIM installed: what you lose and what you don't | 6 min - [How it works](https://getgigapass.com/en/blog/esim-qr-code) | An eSIM's QR code: what it is, why it works once, and what to do if you lose it | 6 min - [How it works](https://getgigapass.com/en/blog/when-to-install-an-esim) | When to install and when to activate your eSIM: getting the timing right | 7 min