iPhone 18 Pro Max Regional Models: SIM and 5G Guide

Buying an iPhone 18 Pro Max abroad now requires a closer look at the model number. A September 25, 2026 report identifies four iPhone 18 Pro Max regional models with different SIM arrangements, 5G support, modems, and battery capacities. The distinction matters most if you travel, import a phone, or want to keep a physical SIM.

Four iPhone 18 Pro Max regional models shown against a world map

Four iPhone 18 Pro Max regional models at a glance

According to the September 25 MacRumors comparison, the model number changes with the sales region. The differences are easy to miss because the phones look similar from the outside.

A3473, United States: eSIM only, with both sub-6GHz and mmWave 5G. A teardown identified Qualcomm’s Snapdragon X80 modem.
A3716, Canada, Japan, Mexico and some Middle Eastern markets: eSIM only, without mmWave. This model uses Apple’s C2 modem.
A3717, UK and much of Europe: physical nano-SIM tray plus eSIM, using Apple’s C2 modem.
A3718, China: a region-specific physical-SIM configuration. Apple also permits eSIM activation there on the Pro models, according to the report.

These details describe the versions sold in those markets. A carrier still decides which bands, eSIM plans, and features it supports, so check its compatibility page before importing a phone.

Why the SIM tray also changes battery capacity

Regulatory filings cited in the report list a 5,567mAh battery for eSIM-only Pro Max units and 5,391mAh for versions with a physical SIM tray. The larger cell fits where the tray hardware would otherwise sit. That is a capacity difference, not a guarantee that every U.S. owner will get the same runtime.

Network conditions, screen brightness, applications, and modem behavior also affect daily battery life. Apple has not explained its modem split across these regions. It would be premature to claim that one version is categorically faster or more reliable without comparable tests on the same networks.

What to check before you buy abroad

Match the phone to your carrier

Look at the model number, physical SIM requirements, and the carrier’s eSIM support. If you rely on a local SIM when travelling, an eSIM-only version needs a compatible plan. If you need mmWave, the U.S. A3473 is the version identified with that support.

Plan the move to your new iPhone

Regional hardware differences do not change the basics of transferring data. If storage is tight during an upgrade, our temporary iCloud storage guide explains an Apple migration option. Back up before you switch, and confirm the new phone is activated on your carrier before retiring the old one.