To call a US cell phone from Mexico, dial the exit code 00 or +, then the US country code 1, followed by the 10-digit number (area code + 7-digit local number). For example, dial 00-1-555-123-4567 or +1-555-123-4567. If you are using a US-based international plan, you might only need to dial +1 and the number.
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To call a US cell phone from Mexico, you need two key pieces: an exit code and the country code. Mexico’s international exit code is 00, though many phones allow using the + symbol instead. After that, dial 1 (the US country code), then the 10-digit US number (area code + 7-digit local number). For example, 00-1-212-555-0100 or +1-212-555-0100. If you are using a landline in Mexico, you must use 00; mobile phones typically accept the + symbol automatically. Note that US cell phones do not require any additional codes if you dial correctly.
Understanding Call Costs
The cost of calling a US cell phone from Mexico depends on your method. Using your US carrier’s standard roaming can cost $0.29 per minute on average, according to FCC reports from 2025. However, many major carriers offer international calling add-ons that reduce the per-minute rate to around $0.10–$0.20. If you are calling from a Mexican line, rates vary by provider. Prepaid international calling cards typically charge $0.05 per minute, but may include connection fees. The table below compares common options.
| Method | Cost per Minute (approx.) | Notes |
|---|---|---|
| US carrier roaming (pay-as-you-go) | $0.29 | No plan needed, but per-minute rate applies |
| US carrier international add-on | $0.10–$0.20 | Requires a monthly package |
| Mexican carrier international call | $0.15–$0.40 | Varies by provider and time of day |
| Prepaid calling card | $0.05–$0.10 | Often has a connection fee |
| VoIP app (Wi-Fi/cellular data) | $0.00–$0.01 | Depends on data plan quality |
Alternatives to Reduce Charges
To avoid high per-minute rates, consider these cost-saving approaches:
- Use a prepaid SIM from a Mexican carrier that includes international minutes. Some offer bundles for as low as $10 per month with 100 minutes to the US.
- Install a VoIP app (e.g., WhatsApp, FaceTime) and call over Wi-Fi or mobile data. This can be essentially free if you have a data plan that includes Mexico roaming. According to the FCC, VoIP calls bypass traditional phone networks, avoiding per-minute charges.
- Buy an international calling card from a reputable provider. Rates can be as low as $0.05/min, but always check for hidden connection fees that add $0.50–$1.00 to the first minute.
- Check if your US carrier offers a “Call from Mexico” feature—some include unlimited calls to US numbers within their North America plans, typically costing an extra $5–$10 per month.
Always compare the total cost, including taxes and fees, before purchasing.
Taxes and Fees on International Calls
International calls from Mexico to the US are subject to a variety of taxes and surcharges. The Tax Foundation reports that the average combined state and local tax rate on international telecommunications services in the US is approximately 17%. This is applied to the base rate of the call. Additionally, the FCC’s Universal Service Fund fee (about 5–7% of interstate/international revenue) is often passed on to consumers. When using a US carrier while roaming in Mexico, you may also face a Service Access Fee (roughly $0.25 per minute in 2025) imposed by the Mexican carrier for completing the call. Always review your carrier’s international rate sheet or online portal for the exact breakdown before dialing.
Choosing the Best Value for Your Calls
To maximize value, start by estimating your monthly call volume. If you call the US from Mexico only a few times, a prepaid calling card or VoIP app is cheapest. For regular calls, consider adding an international plan to your US carrier. The Consumer Expenditure Survey (2025) shows that households with frequent international calls spend an average of $15–$25 per month on call-related charges. By choosing the right method, you can reduce that to under $5 per month. Also, remember to check if your mobile phone supports Wi-Fi calling—if you are connected to Wi-Fi in Mexico, calls to US numbers may be treated as domestic and cost nothing extra (check your carrier’s policy). Always read the fine print: some ‘unlimited’ plans limit international calls to 30 minutes per day.
In summary, the best value depends on your usage pattern. For light use, VoIP is king. For heavier use, a prepaid international package from a budget provider (not naming brands) often beats standard roaming. Combine this with the correct dialing format (00 or +, then 1, then number) to ensure you are not overpaying due to misdialing.