How to Unlock a GSM Verizon Phone and Use Other SIM Networks

Gideon Byron Published on August 27, 2025Unlock Android3-min reading

You have a Verizon phone but want to operate it using a different SIM? Depending on whether it operates on GSM or not, you may have to unlock it. This is regardless of whether you have recently purchased a second-hand phone or you just desire to swap carriers; you need to know how to unlock the GSM Verizon phone devices. In this guide, we will show you how to check if your phone is unlocked, ways to unlock it with or without a password, and even where to find cheap unlocked phones that work right away.

Part 1. How to Tell If a Phone Is GSM Unlocked

Before you try to unlock anything, you need to check if your device already supports GSM networks. Many Verizon models can work as GSM unlocked phones, but not all of them are ready out of the box. If you want to switch carriers or use international SIMs, knowing the status of your phone is the first step to unlocking GSM freedom.

1. Try a SIM Card From Another Carrier

Insert a SIM card from a different network, like AT&T or T-Mobile. If your phone works right away, it means you are likely using a GSM unlock phone with no restrictions.

2. Check in Your Phone Settings

Some phones have a setting under Network or Mobile Info that shows if it is carrier-locked. Look for a message like No SIM restrictions. If you see this, your phone can run as an unlocked device on GSM networks.

3. Contact Verizon Support

Give Verizon a quick call with your IMEI number. They can confirm if your phone is locked or eligible for unlocking. If it meets the rules, they might help unlock GSM phones directly.

4. Use an Online IMEI Checker

Tools like IMEI.info can check your phone's unlock status. Just enter the IMEI number to get a basic report. This is helpful for used phones or online buys.

5. Look for Carrier Branding or Bloatware

Phones with Verizon logos or preloaded apps may be locked. However, some still support GSM networks after unlocking, especially if they were released after 2018.

Part 2. Unlock GSM Phone with UnlockGSM Service

If your Verizon phone is still locked, you do not have to rely on carrier support alone. Third-party tools like UnlockGSM.net offer a fast and simple way to get the job done, no tech skills required. But before we dive into how the service works, it helps to understand what a GSM unlocked phone is in the first place.

A GSM unlocked phone is a gadget that can accept SIM cards from any GSM network, not just the one it was originally tied to. That means more choices, better plans, and the ability to use your phone abroad with local SIMs.

Part 3. How to Unlock a GSM Phone Without a Password

If you forgot your iPhone screen passcode or need to remove an Apple ID from a Verizon device, imyPass iPassGo offers a reliable solution. This tool is designed for iOS users who want to remove different types of locks, including screen passcodes, Apple IDs, Screen Time limits, MDM, and even iTunes backup passwords.

Moreover, it works with most iPhone and iPad models and gives you access again in just a few simple steps. Whether you bought a locked phone or want to reuse an old one, this tool helps you move forward. You might also wonder, Can I use an unlocked GSM phone with Verizon? The answer is yes if the device supports both GSM and CDMA bands, which many modern iPhones do.

Tips. Buy Cheap and Reliable GSM Unlocked Phones

An unlocked GSM cheap handset does not imply that one has to be satisfied with poor quality. It is just a matter of knowing what to identify and look at. The following clever tricks can assist you in making a decent decision

1. Buy from Certified Refurbished Stores

Trusted sellers like Amazon Renewed, Best Buy, or the official Apple and Samsung stores offer certified refurbished phones. These devices are tested, cleaned, and often come with a short warranty, perfect if you want reliability without the high price. Yet, there are times you might need to unlock a refurbished iPhone, which is why you need to test it out first before purchasing

2. Check for GSM Compatibility First

Ensure that the phone uses GSM networks before purchase. Search for those whose models are GSM unlocked or factory unlocked. Look at the model number online and check to see which carrier works with your preferred carrier, such as AT&T, T-Mobile or international SIMs

3. Compare Prices on Deal Sites

Search websites such as Swappa, Decluttr or Slickdeals to get phone deals. Real people and shops frequently present the listings with ratings, so you do not risk becoming a victim of the scam and compare the best places

4. Avoid Phones Locked to One Carrier

Avoid phones that are locked to a single carrier, no matter how good the price is, unless you are confident you will have no trouble with them. It is more secure and quicker to use a GSM unlocked phone that comes out of the box ready to be used

5. Buy Slightly Older Models

Last year's phones often drop in price but still work great. Devices like the iPhone 17, Samsung Galaxy S22, or Pixel 8 are still fast and feature-packed, and now much cheaper than the latest models

6. Ask for IMEI and Check Before Paying

If you are buying from an individual seller, always ask for the IMEI number, since you can use the IMEI to unlock the iPhone. You can use free IMEI checker tools to confirm if the phone is unlocked and not blocklisted. This helps you avoid stolen or blocked devices.

Conclusion

GSM unlocked phones let you use different SIM cards, switch to better plans, or travel with ease. You can verify if your device is unlocked, use services like UnlockGSM.net or imyPass iPassGo to unlock it, and find budget-friendly models that work right out of the box. With a few simple steps, you get more freedom and control. Now that you know how GSM-locked phones work, it is easier to choose the right one and get started.