---
title: "Understanding \"Carrier\" and \"SimLock\" "
description: Apple has dynamic real-time SIM-Lock and carrier data, whereas Android has static original carrier at the time of manufacturing.
---

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# Understanding "Carrier" and "SimLock"

## What is the difference between Apple and Android when it comes to our 'carrier' field, and our 'SimLock' field?

###### PrologMobile provides a 'Carrier' field for most OEMs, from Apple to Samsung, Motorola, Google and more. PrologMobile only provides 'SimLock' for Apple phones.  Our Apple OEM call returns both **SimLock** and **Carrier** fields. These fields are provided in real time and will update if the **SimLock** status or **Carrier** changes. For example, if the device shows: Make: Apple Model: iPhone 12 Pro SimLock: Locked Carrier: AT&T then that means the device is currently SimLocked to AT&T.

###### For Android devices (Samsung, Google, LG, Motorola), there is no real-time SimLock status check. The **Carrier** returned in our Android OEM calls reflects the carrier at the device’s build state—that is, the network for which the device was originally configured and sold, or **“Unlocked”** if it was sold through a Samsung direct channel. For example, if the device shows: Make: Samsung Model: Galaxy S25 Ultra 5G Carrier: AT&T That means this Samsung Galaxy phone was *originally* locked to AT&T, which may or may not still be true, and cannot be determined by PrologMobile.

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