How it works

Mobile data on an old phone: setting up the APN

Updated 2026-10-20 · KeyAgain

The most common reason a classic phone won’t connect isn’t the phone or the app. It’s the data settings. Old phones rarely get them automatically any more, so you type them in once.

What an APN is

The APN (access point name) tells the phone which gateway of your operator to use for the internet. It’s usually a short word or address, such as internet or something like internet.operator.com, sometimes with a username and password. Operators used to send these settings to phones by SMS; many no longer do it for older models.

Find your operator’s settings

Search for “your operator APN settings” or look on its help pages. If your SIM is from a brand that rents another network (an MVNO), use the brand’s own APN, not the host network’s.

Where to type it

Menu names vary by model and language, but they’re usually close to these:

• Nokia Series 40: Settings › Configuration › Personal configuration settings › Add new › Access point (or Web).
• Nokia Symbian (S60): Settings › Connection (or Connectivity) › Destinations or Access points › New access point.
• Motorola: Web Access › Web Sessions › New entry (Java apps then ask which session to use).
• Sony Ericsson: Settings › Connectivity › Internet settings › Internet profiles (or Data accounts).
• Samsung: Settings › Network or Connection › Profiles.
• BlackBerry OS: the TCP/IP settings, under Options › Advanced Options, or Options › Device › Advanced System Settings, depending on the version. Tick “APN settings enabled” and type the APN.

When KeyAgain first connects, the phone may ask which connection to use: choose the profile you just created (or your Wi-Fi).

Which SIM works in 2026

• The network has to support your phone: most classic phones need 2G, some also have 3G. 2G is gone in the US and Switzerland and ending in France; elsewhere in Europe it runs for a few more years. Check your country.
• A cheap pay-as-you-go or data SIM is usually enough. KeyAgain sends mostly text; photos and voice notes use more.
• Old phones take the full-size mini-SIM. A nano or micro SIM works with an adapter, but adapters can get stuck in tight slots: ask the operator for a full-size SIM if you can.

Still not connecting?

• Check that mobile data isn’t switched off and that the phone shows a network signal.
• Restart the phone after saving the settings.
• If the phone has Wi-Fi, try that first: it rules out the APN.
• Tell us your phone and operator at hello@keyagain.app: we’ll help.