Does a US phone work in Mexico? Bands, VoLTE and IMEI

Does a US phone work in Mexico? On the spec sheet, a current flagship usually lists every band that Mexican carriers document, but a band match only tells you the radio can hear the network. Whether calls work on your line depends on things only the carrier can confirm: VoLTE support, the IMEI's status and, sometimes, its own list of approved phones. This guide compares the bands of the US, Mexican, international and China models of the iPhone 18 Pro, plus the Mexican and China versions of the Xiaomi 17, from the makers' own pages as of October 4, 2026, then walks through the checks a band table can't do. We didn't test any of these phones on a Mexican network.

Key takeaways

• On paper, all six models we compared list every band in our Mexico check, including the US iPhone 18 Pro (A3472) and the China Xiaomi 17. That's a spec comparison from Apple's and Xiaomi's pages, not proof that a phone works on a given line.
• Apple sells a separate Mexico model. It's the A3713, the same one sold in Canada and Japan, per Apple's model list. Like the US model, it has no SIM tray.
• A US phone must be unlocked before it takes a Mexican SIM. Check it in Settings before you buy or travel.
• VoLTE is the part the band table can't answer. Apple lists VoLTE on iPhone for Telcel, AT&T and Movistar, and Wi-Fi Calling only for Telcel. Telcel's own page asks for "a Telcel phone, compatible with VoLTE" and a SIM version 6.2 or later.
• Run the IMEI through the regulator's lookup before you pay for a used or imported phone. A phone reported stolen or lost can be blocked on every network.

Does a US phone work in Mexico? What the band table shows

The table below compares the bands Mexican networks use (next section) with what each phone maker lists for each model. Apple's figures come from its 5G and LTE bands page, and the model numbers and markets from Apple's iPhone model list. Xiaomi's come from its Mexican spec page for the Xiaomi 17, which matches the global page band for band, and its China spec page. All were checked on October 4, 2026.

Band in our Mexico check	iPhone 18 Pro A3472 (US)	iPhone 18 Pro A3713 (Mexico)	iPhone 18 Pro A3714 (other countries)	iPhone 18 Pro A3715 (China)	Xiaomi 17 (Mexico and global)	Xiaomi 17 (China)
LTE 2 (1900 MHz)	Yes	Yes	Yes	Yes	Yes	Yes
LTE 4 and 66 (AWS)	Yes	Yes	Yes	Yes	Yes	Yes
LTE 5 (850 MHz)	Yes	Yes	Yes	Yes	Yes	Yes
LTE 28 (700 MHz)	Yes	Yes	Yes	Yes	Yes	Yes
5G n78 (3.5 GHz)	Yes	Yes	Yes	Yes	Yes	Yes
5G n7, n38 and n41 (2.5 GHz)	Yes	Yes	Yes	Yes	Yes	Yes
SIM	eSIM only	eSIM only	Nano-SIM tray	Nano-SIM tray	Two nano-SIMs, nano-SIM plus eSIM, or two eSIMs	Two nano-SIMs; the page mentions no eSIM

"Yes" means the maker lists that band for that model; it doesn't mean we measured anything. The iPhone 18 Pro Max model numbers (A3473 for the US, A3716 for Mexico, A3717 and A3718 elsewhere) give the same result in every row on Apple's page. The SIM row for iPhone comes from Apple's model list, which says the iPhone 18 Pro has no SIM tray in the US, Mexico and 11 other countries and territories, and a nano-SIM tray everywhere else.

Where the models do differ, it's outside our check:

• The US iPhone adds millimeter-wave 5G (n258, n260 and n261). The Mexican A3713 doesn't list them. None of the Mexican carrier sources we cite mention millimeter-wave service.
• The Mexican iPhone adds LTE bands 11 and 21 (1500 MHz), which the US model doesn't list. Neither is in our Mexico check.
• The Pro Max modem differs by country. According to MacRumors, which cites Apple's tech specs, the iPhone 18 Pro uses Apple's own C2 modem everywhere, while US units of the 18 Pro Max use Qualcomm's Snapdragon X80 and Pro Max units sold elsewhere use the C2. Apple's band lists are what we compare; the modem doesn't show up in them.
• The China Xiaomi 17 lists fewer LTE bands overall. Bands 13, 32 and 71 are missing, for example, but none of those is in our check. The China page also names only Chinese carriers for network and HD voice support, and notes that actual band use depends on local carriers.

Which bands Mexican carriers use

These are the Mexico LTE bands and 5G bands that the sources below document, and they're the rows of the table above. The band numbers are our mapping of each frequency range to the names phone makers print (Apple labels band 28 "700 APT", band 66 "AWS-3" and n78 "TD 3500", for example).

Network	What the source documents	Bands phones list for it	Source
Telcel and AT&T	AWS spectrum (1710 to 1780 and 2110 to 2180 MHz) awarded in 2016 to deploy 4G	LTE 4 and 66	The IFT, Mexico's regulator at the time
Telcel	5G in the 3.5 GHz range; the IFT approved its move to 3,350 to 3,450 MHz in February 2022	n78	The IFT
AT&T	5G launched in December 2021 on 2.5 GHz spectrum	n7, n38 or n41 (the report doesn't say which)	RCR Wireless
Movistar	All traffic moved to AT&T's access network on June 30, 2022	Same as AT&T	DPL News
Bait	Its traffic runs on Altán's shared network, which has 90 MHz at 700 MHz under band 28	LTE 28	Expansión; 5G Americas
Mobile service in general	The 800 MHz (814 to 849 and 859 to 894 MHz), PCS (1850 to 1910 and 1930 to 1990 MHz) and AWS bands are the ones used for mobile service	LTE 5 and 26, LTE 2, LTE 4 and 66	The IFT

The details: the IFT's May 2016 statement granted AT&T and Telcel AWS spectrum for 4G. Its February 2022 statement let Telcel use its 3.5 GHz concessions for mobile 5G. RCR Wireless reported in May 2022 that AT&T had launched 5G in Mexico the previous December on 2.5 GHz. DPL News reported that Telefónica, Movistar's owner, finished moving its traffic to AT&T's network on June 30, 2022. Expansión reported in November 2025 that Bait carries its traffic on Altán, and a September 2024 white paper by 5G Americas, an industry group, says Altán holds 90 MHz of the 700 MHz band under band 28. The IFT's consumer page lists the 800 MHz, PCS and AWS bands.

Carriers add spectrum over time, and none of these sources is a complete current band list from the carrier itself. That's one more reason to finish with the carrier's own checker in step 4.

Step 1: Find your phone's exact model number

The model name isn't enough: an "iPhone 18 Pro" can be any of four models, and the iPhone 18 Pro model number is what tells them apart. Apple's steps to find the model number: open Settings, tap General, then About. Next to Model Number you'll see a part number; tap it to see the model number, which starts with A. On an iPhone without a SIM tray, Apple says the number is also printed inside the USB-C connector.

For an Android phone, look in the phone's About screen or on the box for the exact model code, then find that code on the maker's spec page for your region.

Step 2: Compare the bands with the table

This step answers the narrow version of "will my phone work in Mexico": can the radio hear the network? If your model is in the table, you're done with this step. If it isn't, open the maker's spec page for that exact model and look for the bands in the first column: LTE 2, 4 or 66, 5 and 28 and, for 5G, n78 and the 2.5 GHz bands.

What matters most depends on your carrier:

• Telcel: LTE 4 or 66 for 4G, n78 for its 3.5 GHz 5G.
• AT&T and Movistar: LTE 4 or 66, plus a 2.5 GHz 5G band.
• Bait: LTE 28, since Altán's network runs on 700 MHz.

A phone without band 28 can still match the bands documented for Telcel and AT&T, but it lists nothing that fits Altán's 700 MHz network. Bait's FAQ makes a related point: it says a phone not made for the Mexican market "might not be compatible with all the frequency bands in Mexico."

Step 3: Make sure the phone is unlocked

Using a US phone in Mexico with a local line starts here: a phone locked to a US carrier won't accept a Mexican SIM or eSIM until that carrier unlocks it. Apple's bands page says unlocked iPhone models may support 5G and LTE outside the country of purchase with a valid SIM from a supported carrier.

To check an iPhone, Bait's FAQ gives the path: Settings, General, About, then look at Carrier Lock. "No SIM restrictions" means it's unlocked; a carrier's name means it's locked to that carrier. Bait also asks for an unlocked phone before you run its compatibility check.

The US and Mexican iPhone 18 Pro are both eSIM-only, so your Mexican line has to move to an eSIM. Our iPhone 18 Pro eSIM guide for Mexico covers how each carrier handles that.

Step 4: Check VoLTE and Wi-Fi Calling with your carrier

VoLTE (voice over LTE) is how calls travel over a 4G network. It's the check a band table can't do, because the carrier decides which phones get it. Here's what each source says, as of October 4, 2026:

Carrier	VoLTE on iPhone	Wi-Fi Calling on iPhone	What the carrier's own page asks for
Telcel	Listed by Apple	Listed by Apple	A Telcel phone compatible with VoLTE, VoLTE turned on, and a SIM version 6.2 or later; a lookup by Telcel number
AT&T	Listed by Apple	Not listed	AT&T's pages blocked our requests on October 4
Movistar	Listed by Apple	Not listed	Not covered here
Bait	Not on Apple's list	Not on Apple's list	An unlocked phone and an IMEI check on its site

The "VoLTE on iPhone" and "Wi-Fi Calling" columns come from Apple's carrier features page for Latin America, which doesn't list Bait or Altán at all. Telcel's VoLTE page lists its three requirements and a lookup by phone number, and says VoLTE is required for international roaming. Its Wi-Fi Calling page says that service needs VoLTE active and a compatible phone, and has to be activated at a Telcel customer service center.

How strict is "a Telcel phone"? Telcel's page doesn't say whether an imported model qualifies. Back in June 2018, Xataka México reported that Telcel required phones certified with it for VoLTE and that the author's imported Pixel 2 XL didn't get it. That report is eight years old, so treat it as history, not current policy. Telcel's number lookup is the current answer for your line.

On Bait, its compatibility page checks your IMEI and says an incompatible phone won't connect to its "4.5G LTE" network even with a Bait SIM. Because that network is LTE, our inference is that calls there depend on VoLTE working on your phone; Bait's checker is how you confirm it.

Step 5: Check the IMEI before you buy

The IMEI is the phone's 15-digit serial number; dial *#06# to see it. Mexico's regulator, the CRT, runs a free IMEI lookup against the GSMA's global list of phones reported stolen or lost. The CRT says it only works from Mexico, allows two lookups a day, and that a block applies on other operators' networks and in other countries too.

What about registering an imported phone? We found no CRT page that asks an individual to register or certify a phone brought in for personal use. Mexico's current registration rule links each line to its owner's CURP, not the phone's IMEI. Apple's no-service troubleshooting page does suggest asking your carrier whether the government requires IMEI registration for an iPhone bought outside the country, so ask when you activate the line.

Bait's FAQ adds one more clue: to tell whether a phone was made for the Mexican market, it says to look for the NOM label (Mexico's official standards mark) on the box.

What changes with a China-market phone

The Xiaomi 17 shows the gap between bands and everything else. Its China version lists every band in our check, yet Xiaomi's China page names only Chinese carriers for network and HD voice support, and it describes a China model with two nano-SIM slots and no eSIM. The Mexican version adds eSIM options.

Software is the other difference. A China unit ships with Xiaomi's China software, and in our iPhone Duo vs Xiaomi 18 Fold comparison, a reviewer's China-market Xiaomi had the Play Store installed by the reseller, not by Xiaomi. Whether VoLTE works on a China unit with a Mexican carrier is exactly the kind of thing only the carrier's checker can tell you.

Troubleshooting

• Data works but calls fail. That points to VoLTE, not bands. Run Telcel's number lookup or Bait's IMEI check, and check that VoLTE is on. Telcel's steps on iPhone: Settings, Cellular, Voice & Data options, then turn on VoLTE.
• The phone says SIM not supported. It's probably still locked to its original carrier. Check Carrier Lock in Settings, General, About.
• No service at all with a working line. Check the IMEI in the CRT's lookup, then work through our guide to SOS and No Service on iPhone in Mexico, which covers the CURP line suspension too.
• No signal at all on Bait. Check that the phone lists LTE 28, then run Bait's IMEI check.
• 5G never shows up. Check n78 for Telcel and the 2.5 GHz bands for AT&T. A missing band isn't the only possible cause; the carrier decides which phones and plans get 5G.

Bottom line

On bands alone, the answer to "does a US phone work in Mexico" is usually yes for a current flagship: the US iPhone 18 Pro and the China Xiaomi 17 both list every band Mexican carriers document, according to Apple's and Xiaomi's pages as of October 4, 2026. That only settles the radio. Before you buy, or before you rely on a US phone in Mexico for calls, check that the phone is unlocked and that its IMEI is clean, then run your carrier's own checker for VoLTE. If the carrier's answer is no, the band table won't change it. Recheck Apple's carrier features page and your carrier's checker before you buy, since both can change after October 4, 2026.

FAQ

Will a US iPhone work in Mexico?

According to Apple's band list, the US iPhone 18 Pro (A3472) lists every band in our Mexico check, the same as the Mexican A3713. It also has to be unlocked, and calls depend on the carrier supporting VoLTE on it. Both models are eSIM-only.

What is the model number of the Mexican iPhone 18 Pro?

Apple's model list gives A3713 for the iPhone 18 Pro sold in Mexico, Canada, Japan and several other countries, and A3716 for the iPhone 18 Pro Max. The US models are A3472 and A3473.

Does a China Xiaomi phone work in Mexico?

The China Xiaomi 17 lists all the bands in our check, according to Xiaomi's China spec page. But that page names only Chinese carriers for network and voice support, and it describes physical SIM slots only. Check VoLTE with your carrier before you rely on it for calls.

Which LTE bands does Mexico use?

The IFT lists the 800 MHz, PCS and AWS bands for mobile service, which phones list as LTE 5, 2 and 4 or 66. Altán's network, used by Bait, runs on 700 MHz (band 28), and 5G uses 3.5 GHz on Telcel and 2.5 GHz on AT&T, per the IFT and press reports.

How do I check if a phone is blocked in Mexico?

Dial *#06# for the IMEI and enter it in the CRT's free IMEI lookup. The CRT says it checks the GSMA's list of phones reported stolen or lost, works only from Mexico, and allows two lookups a day.