---
title: "Unefon: MCC 334 MNC 040"
mcc: "334"
mnc: "040"
plmn: "334040"
brand: "Unefon"
operator: "AT&T Mexico"
country: "Mexico"
country_iso: "MX"
region: "North America & Caribbean"
technologies: ["2G"]
updated: "2025-04-09"
canonical: "https://mcc-mnc.org/networks/334_040"
---

# Unefon: MCC 334, MNC 040 (Mexico)

**Unefon** (operator: AT&T Mexico) is a mobile network in [Mexico](https://mcc-mnc.org/countries/mexico.md) (North America & Caribbean), identified by MCC **334** and MNC **040**: PLMN ID 334040, also written 334-040 or 334 040. It runs 2G.

## Identifiers

| Field | Value |
|---|---|
| MCC (Mobile Country Code) | 334 |
| MNC (Mobile Network Code) | 040 |
| PLMN ID (MCC+MNC) | 334040 |
| TADIG code | — |
| Brand | Unefon |
| Operator | AT&T Mexico |
| Country | Mexico (MX) |
| Region | North America & Caribbean |
| Dialling code | — |
| Technologies | 2G |
| Last updated | 2025-04-09 |

## Technologies & bands

| Generation | Bands | Measured cells |
|---|---|---|
| 2G | [CDMA 1900](https://mcc-mnc.org/coverage/cdma_1900.md), [CDMA 800](https://mcc-mnc.org/coverage/cdma_800.md) | — |

## Voice & calling services

| Service | Status | Source |
|---|---|---|
| VoLTE | Unknown | — |
| VoWiFi | Unknown | — |
| ViLTE | Unknown | — |
| VoNR | Unknown | — |

A service not marked Supported or Not supported is unknown: no data either way, not a sign that the network lacks it.

## About Unefon

AT&T Mexico (Unefon) is a mobile network operator providing services in Mexico, part of the North America & Caribbean region. Identified by Mobile Country Code (MCC) 334, which designates Mexico, and Mobile Network Code (MNC) 40, it offers a range of telecommunications solutions, including voice, data, and messaging, primarily targeting the prepaid market under the "Unefon" brand. AT&T's presence in Mexico represents a significant investment in the country's mobile infrastructure, aiming to compete with established players like Telcel, the largest mobile operator in Mexico, and Movistar.

Unefon distinguishes itself with its prepaid focus, often offering attractive data packages and social media bundles appealing to a cost-conscious consumer base. AT&T Mexico's network infrastructure builds upon previous acquisitions and investments, working to expand 4G LTE coverage across the country and now pushing to grow its 5G footprint, trying to offer competitive speeds and reliability compared to other network operators in the Mexican market. AT&T's strategic vision includes leveraging its North American network to deliver seamless roaming experiences for customers traveling between Mexico, the United States, and Canada.

## Android carrier config highlights

| Setting | Value | Key |
|---|---|---|
| Allow emergency numbers in call log | Yes | `allow_emergency_numbers_in_call_log_bool` |
| Mmi two digit number pattern | #9 | `mmi_two_digit_number_pattern_string_array` |
| Skip cf fail to disable dialog | Yes | `skip_cf_fail_to_disable_dialog_bool` |

## Other networks in Mexico

| MCC | MNC | Network | TADIG |
|---|---|---|---|
| 334 | 001 | [Comunicaciones Digitales Del Norte, S.A. de C.V.](https://mcc-mnc.org/networks/334_001.md) | — |
| 334 | 010 | [AT&T](https://mcc-mnc.org/networks/334_010.md) | — |
| 334 | 020 | [Telcel](https://mcc-mnc.org/networks/334_020.md) | MEXTL |
| 334 | 030 | [Movistar](https://mcc-mnc.org/networks/334_030.md) | MEXMS |
| 334 | 050 | [AT&T / Unefon](https://mcc-mnc.org/networks/334_050.md) | MEXIU |
| 334 | 060 | [Servicios de Acceso Inalambrico, S.A. de C.V.](https://mcc-mnc.org/networks/334_060.md) | — |
| 334 | 066 | [Telefonos de México, S.A.B. de C.V.](https://mcc-mnc.org/networks/334_066.md) | — |
| 334 | 070 | [Unefon](https://mcc-mnc.org/networks/334_070.md) | — |
| 334 | 080 | [Unefon](https://mcc-mnc.org/networks/334_080.md) | — |
| 334 | 090 | [AT&T](https://mcc-mnc.org/networks/334_090.md) | MEXN3 |
| 334 | 100 | [Telecomunicaciones de México](https://mcc-mnc.org/networks/334_100.md) | — |
| 334 | 110 | [Maxcom Telecomunicaciones, S.A.B. de C.V.](https://mcc-mnc.org/networks/334_110.md) | — |
| 334 | 120 | [Quickly Phone, S.A. de C.V.](https://mcc-mnc.org/networks/334_120.md) | — |
| 334 | 130 | [Axtel, S.A.B. de C.V.](https://mcc-mnc.org/networks/334_130.md) | — |
| 334 | 140 | [Nextel](https://mcc-mnc.org/networks/334_140.md) | MEXAL |
| 334 | 150 | [Ultranet](https://mcc-mnc.org/networks/334_150.md) | — |

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