---
product_id: 95249013
title: "MOST SIM - T-Mobile USA SIM Card 12 Days, Unlimited High Speed Data/Calls/Texts, T-Mobile SIM Card US United States"
brand: "mostsim"
price: "FREE"
currency: KRW
in_stock: false
reviews_count: 7
url: https://www.desertcart.kr/products/95249013-most-sim-t-mobile-usa-sim-card-12-days-unlimited
store_origin: KR
region: South Korea
---

# 12 Days Validity Triple Format SIM 4G/LTE Speed MOST SIM - T-Mobile USA SIM Card 12 Days, Unlimited High Speed Data/Calls/Texts, T-Mobile SIM Card US United States

**Brand:** mostsim
**Price:** FREE
**Availability:** ❌ Out of Stock

## Summary

> 📱 Stay Connected, Stay Ahead!

## Quick Answers

- **What is this?** MOST SIM - T-Mobile USA SIM Card 12 Days, Unlimited High Speed Data/Calls/Texts, T-Mobile SIM Card US United States by mostsim
- **How much does it cost?** FREE with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/95249013-most-sim-t-mobile-usa-sim-card-12-days-unlimited)

## Best For

- mostsim enthusiasts

## Why This Product

- Trusted mostsim brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Hotspot Ready!:** Personal hotspot available at 3G speed to keep your devices connected.
- • **Quick Activation!:** Get your SIM activated in just 24 hours for seamless connectivity.
- • **No Roaming Worries!:** Enjoy unlimited calls and texts within the USA without any hidden fees.
- • **Stay Connected Anywhere!:** Experience true unlimited high-speed data on T-Mobile's robust network.
- • **Flexibility at Your Fingertips!:** Triple format SIM card (Standard/Micro/Nano) for all your devices.

## Overview

The MOST SIM is a T-Mobile USA authorized SIM card offering 12 days of unlimited high-speed data, calls, and texts. Compatible with GSM unlocked phones, it features a triple format design and ensures hassle-free activation within 24 hours.

## Description

Full description not available

## Features

- MOSTSIM is a T-Mobile USA authorized retailer. T-Mobile branded sim card, better than other MVNO or roaming products.
- Valid for 12 days upon activation. True Unlimited High-Speed Data at 4G/LTE speed on T-Mobile Network USA.
- Unlimited calls and texts within USA, personal hotspot available at 3G speed. Check the Internet coverage 🔍 https://prepaid.t-mobile.com/prepaid/coverage-map
- Triple format SIM card: Standard/ Micro/ Nano. Compatible with GSM unlocked phones that support LTE B2 and B4. Please refer to 👉 http://coupf.com/mosttmospec
- Must be activated within 90 days of purchase. The activation could take up to 24 hours. Please register the online form at least 1 day prior to your activation date. Your SIM card will be activated before 12 pm on your activation date (Pacific Time). Activation website: https://mostsim.com/en/activate/

## Images

![MOST SIM - T-Mobile USA SIM Card 12 Days, Unlimited High Speed Data/Calls/Texts, T-Mobile SIM Card US United States - Image 1](https://m.media-amazon.com/images/I/71lJVdunreL.jpg)
![MOST SIM - T-Mobile USA SIM Card 12 Days, Unlimited High Speed Data/Calls/Texts, T-Mobile SIM Card US United States - Image 2](https://m.media-amazon.com/images/I/61Zcalwr5yL.jpg)

## Available Options

This product comes in different **Size Name** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Very simple to use and Setup. Well worth it !!!
  

*by C***R on Reviewed in the United Kingdom on 28 June 2019*

Used this product in Florida for 28days and it was pretty much faultless. As said in previous reviews you do get the odd call from strange numbers but i only received maybe 3 in total and as I was using it mainly for data I cancelled incoming calls on my phone. I found the data perfect, perfectly quick (which was what I was worried about) and no loss of signal.I setup the phone as per instructions and picked the date I wanted to it to activate when I was away. By the time I woke up on my 2nd morning, the day I had it activated for, i had full signal.I was able to use my mobile like at home for the full time and I would definitely be getting one of these again when I travel to the USA.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Great Sim worked perfectly for Florida USA in Galaxy S7 Edge
  

*by A***R on Reviewed in the United Kingdom on 13 September 2018*

I used this for a 14 day trip to Florida with my Samsung Galaxy S7 Edge That was on 02.I did lots of research and basically found out i had 3 things to do before leaving the UK.- Samsung products are apparently locked in the box to work in the UK only - Making just 1 standard 5 minute phone call stops this- Unlock my phone so it can work on a different provider (t mobile) - rang up 02, got an unlock code - borrowed a friends (non 02) sim card put it in my phone and typed the unlock code in- Register the SIM Online with MOST SIM (described in the instructions)Filled out the online form 3 or so days before, got into america turned the phone on with the new sim, and it started working perfectly, did not receive any spam texts or phone calls the whole time i was there unlike some of the other comments below.+ Came with Sim Remover+ Came with Instructions+ Came with All 3 types of Sim's+ Zero phone calls/texts+ Worked on time as expected+ Easy to set up onlineWould highly highly recommend this to anyone who is thinking of going. Hopefully my review will convince other people to try it and hopefully you won't have to look up as much information as i did.Saved myself over £70.. when 02 wanted Around £110 for my 2 weeks away.:)

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Works perfectly if you follow the instructions carefully
  

*by A***R on Reviewed in the United Kingdom on 28 January 2020*

This was really important and useful to our holiday - it meant we could use maps to travel, access timetables etc. Everything we needed to do we could do because of the unlimited internet access. We got another cheaper "calls only" SIM for my wife to keep in contact and used this one for all the internet needs. It also allowed us to video call back home and also access online apps for Disney / Universal.It worked perfectly in San Francisco, Sacramento, Santa Barbara and Los Angeles and it even worked in Yosemite National Park (in the main park area by the falls / El Capitan) although there were spots in the park such as where we stayed (El Portal) where it didn't work but that's to be expected in remote places.This was worth every penny for me - saved a fortune compared with using "roaming" and guaranteed no "surprise" charges once you've bought it. Will do this every time if I'm lucky enough to head back to USA.DO follow the instructions carefully to activate it at the right time and ensure your phone (mine was iPhone 7 Plus) is unlocked to use the SIM BEFORE you go. If you follow the instructions it should work fine.

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**Shop now:** [https://www.desertcart.kr/products/95249013-most-sim-t-mobile-usa-sim-card-12-days-unlimited](https://www.desertcart.kr/products/95249013-most-sim-t-mobile-usa-sim-card-12-days-unlimited)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-25*