GSM Phones Refurbished (unlocked)

This Black Friday, sell your old phone and rec...

1,105 products
-62%
less than new
iPhone 12 - Unlocked

iPhone 12 - Unlocked64 GB - Black

4.2/5
(2978)
Starting at
$236.17
$629.00 new
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Staff pick
Our latest and most favorite offer.
Bestseller
iPhone 13 - Unlocked

iPhone 13 - Unlocked128 GB - Midnight

4.3/5
(1788)
Starting at
$347.65
$629.00 new
Bestseller
Galaxy S21 5G - Unlocked

Galaxy S21 5G - Unlocked128 GB - Gray

4.2/5
(1006)
Starting at
$160.70
$1,000.00 new
Bestseller
iPhone 11 - Unlocked

iPhone 11 - Unlocked64 GB - Black

4.2/5
(1691)
Starting at
$205.00
$499.00 new
iPhone 14 - Unlocked

iPhone 14 - Unlocked128 GB - Midnight

4.4/5
(685)
Starting at
$388.54
$629.00 new
iPhone 12 - Unlocked

iPhone 12 - Unlocked128 GB - Black

4.2/5
(2960)
Starting at
$232.00
$679.00 new
iPhone XR - Unlocked

iPhone XR - Unlocked64 GB - Black

4.2/5
(727)
Starting at
$166.50
$299.00 new
iPhone SE (2020) - Unlocked

iPhone SE (2020) - Unlocked64 GB - Black

4.3/5
(727)
Starting at
$126.79
$399.00 new
iPhone 12 - Unlocked

iPhone 12 - Unlocked64 GB - Blue

4.2/5
(2960)
Starting at
$243.04
$629.00 new
iPhone SE (2022) - Unlocked

iPhone SE (2022) - Unlocked64 GB - Midnight

4.5/5
(429)
Starting at
$168.89
$429.00 new
iPhone 13 - Unlocked

iPhone 13 - Unlocked128 GB - Blue

4.3/5
(1788)
Starting at
$339.99
$629.00 new
Galaxy S20 FE 5G - Unlocked

Galaxy S20 FE 5G - Unlocked128 GB - Dark Blue

4.1/5
(370)
Starting at
$154.28
$903.28 new
iPhone 11 - Unlocked

iPhone 11 - Unlocked128 GB - Black

4.2/5
(1697)
Starting at
$227.51
$549.00 new
Galaxy S21 Ultra 5G - Unlocked

Galaxy S21 Ultra 5G - Unlocked128 GB - Black

4.2/5
(397)
Starting at
$228.00
$1,299.99 new
Galaxy S22 5G - Unlocked

Galaxy S22 5G - Unlocked128 GB - Black

4/5
(391)
Starting at
$205.00
$579.00 new
iPhone 13 Pro - Unlocked

iPhone 13 Pro - Unlocked128 GB - Sierra Blue

4.3/5
(969)
Starting at
$420.04
$1,000.00 new
iPhone 13 - Unlocked

iPhone 13 - Unlocked128 GB - Pink

4.3/5
(1789)
Starting at
$359.99
$629.00 new
iPhone 12 - Unlocked

iPhone 12 - Unlocked128 GB - Blue

4.2/5
(2978)
Starting at
$260.99
$679.00 new
iPhone 13 mini - Unlocked

iPhone 13 mini - Unlocked128 GB - Blue

4.1/5
(602)
Starting at
$288.99
$629.00 new
iPhone 14 - Unlocked

iPhone 14 - Unlocked128 GB - Blue

4.4/5
(685)
Starting at
$395.32
$629.00 new
iPhone 7 - Unlocked

iPhone 7 - Unlocked32 GB - Black

4.2/5
(133)
Starting at
$88.76
$179.00 new
iPhone X - Unlocked

iPhone X - Unlocked256 GB - Space Gray

4/5
(297)
Starting at
$182.04
$599.00 new
iPhone 15 - Unlocked

iPhone 15 - Unlocked128 GB - Black

4.6/5
(275)
Starting at
$579.36
$729.00 new
iPhone 13 Pro - Unlocked

iPhone 13 Pro - Unlocked128 GB - Graphite

4.3/5
(968)
Starting at
$417.66
$899.00 new
iPhone 14 Pro Max - Unlocked

iPhone 14 Pro Max - Unlocked256 GB - Space Black

4.3/5
(491)
Starting at
$680.59
$1,199.00 new
iPhone 14 - Unlocked

iPhone 14 - Unlocked128 GB - Purple

4.4/5
(683)
Starting at
$395.32
$629.00 new
iPhone 12 Pro - Unlocked

iPhone 12 Pro - Unlocked128 GB - Graphite

4.2/5
(1040)
Starting at
$318.99
$799.00 new
iPhone 13 - Unlocked

iPhone 13 - Unlocked256 GB - Midnight

4.3/5
(1793)
Starting at
$358.48
$729.00 new
Galaxy S22 Ultra 5G - Unlocked

Galaxy S22 Ultra 5G - Unlocked128 GB - Black

4.1/5
(633)
Starting at
$348.79
$899.00 new
iPhone 12 mini - Unlocked

iPhone 12 mini - Unlocked64 GB - Black

4/5
(931)
Starting at
$202.89
$459.00 new

GSM Phones Refurbished (unlocked)'s customer reviews

4.2/5

30,658 verified reviews in the last 12 months.

  • J

    Juan ignacio L.

    Purchased on November 27, 2024

    4.8/5

    I recently purchased a Google Pixel 7 Pro from Back Market, and I’m really impressed with my experience. The phone arrived in excellent condition, just as described on the site. The pricing was competitive, and the purchase process was smooth and straightforward. Shipping was faster than expected, and the packaging was secure, ensuring the phone arrived safely. Overall, I’m very satisfied with both the product and the service. I would highly recommend Back Market to anyone looking for quality refurbished electronics at great prices!

    Reviewed in the United States on December 9, 2024

    Google Pixel 7 Pro 128GB - White - Unlocked
  • T

    Tanish N.

    Purchased on September 26, 2024

    4.2/5

    I loved the product and its quality, also got the item delivered earlier than expected. It was very economical, as I got an iPhone 15 pro 512 GB for just $904, and that to in excellent condition. Also, I got Battery health at 100%, moreover phone still has an active Apple warranty. I am not sure if after refurbishing the phone it is still water resistant or not, and so I wouldn't risk it. The charging cable is not original and very small in length. Rest everything is awesome and I love it. I checked the Antutu and Geek bench benchmark scores, they were a little lower side from the actual score but I guess that is due to the low charging and background applications.

    Reviewed in the United States on December 9, 2024

    iPhone 15 Pro 512GB - Natural Titanium - Unlocked - Dual eSIM
  • R

    Rita K.

    Purchased on November 5, 2024

    5/5

    Exchanged a Samsung Galaxy S9 for a Samsung Galaxy S23. I came across Back Market in an article and after checking them and many other refurbished electronics suppliers I felt completely comfortable to take a chance. The order process itself was very easy and product shipped/arrived as promised. The staff picks were helpful in deciding on what to get as well. I had no problem setting up the phone myself thru my current carrier Verizon. ALL data transferred successfully. I took it in just to make sure I did everything correctly and without knowing it was refurbish, even they said the phone looked and operated as New. I would definitely use Black Market again . (I ordered an Excellent level which was similar price to Good condition at the time.)

    Reviewed in the United States on December 9, 2024

    Galaxy S23 128GB - Purple - Unlocked
  • R

    Robert P.

    Purchased on November 2, 2024

    4.2/5

    So far I'm impressed with my purchase of the refurbished iPhone 13 mini. The phone appears to be in excellent shape with no cosmetic damage. The case and screen are blemish free and the battery charges to 100%! The only difficulty I have had is migrating the data form my old Android phone to the new iPhone. The service provider (T-Mobile) and Apple Support weren't much help. I will definitely consider another refurbished phone from this seller in the future.

    Reviewed in the United States on December 9, 2024

    iPhone 13 mini 128GB - Midnight - Locked T-Mobile
  • T

    Tyler W.

    Purchased on November 13, 2024

    5/5

    I'm was little scared because I never brought refurbished phone in my life but when I say I'm ordering again brought iPhone 14 plus (product) red no scratches my phone was flawless...it's like I brought the premium my iPhone look new like I brought it from the apple store I would be buying some more electronics from here

    Reviewed in the United States on December 9, 2024

    iPhone 14 Plus 128GB - Red - Unlocked - Dual eSIM
  • J

    Juliana R.

    Purchased on October 6, 2024

    4.9/5

    I was so hesitant to buy a refurbished phone off Back Market. After losing my phone that I bought from Apple (and am still paying off), I knew I didn't want to spend the $1,300 on a brand new one AGAIN. The iPhone 14 pro max I bought of this site is EXCELENT. I purchased the "good" option, expecting it to come with a few scratches from a previous owner.... It's literally a brand new phone. Not a scratch on it and works absolutely perfectly. Not sure how this site does with other products outside of iPhones... but I will 100% be coming back when the time comes to purchase another.

    Reviewed in the United States on December 9, 2024

    iPhone 14 Pro Max 256GB - Space Black - Unlocked - Dual eSIM
  • F

    Faye H.

    Purchased on December 5, 2024

    4.6/5

    I am happy with my purchase now. However my phone came without being restored to factory settings. There was no "hello" or prompts to set up my phone when I powered it on. Just a display page of all the apts on the phone. Being a very technical challenged person, it took five hours to finally try the reset and restore to factory settings. It worked and I was able to set up my refurbished Iphone 12. A little disappointed that there is only 79% of battery Maximum Capacity along with the message that my battery's health is significantly degraded.

    Reviewed in the United States on December 11, 2024

    iPhone 12 128GB - Black - Unlocked
  • J

    John F.

    Purchased on November 9, 2024

    5/5

    Absolutely fabulous transaction! The iPhone 13 mini is getting scarce and I was hoping to get one before they disappeared from the smartphone universe. The phone I bought from Back Market was pristine. Like new with no indication that it had ever been used. Battery health was at 88% which is more than acceptable. Overall it was such a great buy and fantastic experience that I would not hesitate to send anyone in the market for excellent refurbished electronics to Back Market.

    Reviewed in the United States on December 9, 2024

    iPhone 13 mini 128GB - Midnight - Unlocked
  • R

    Raul R.

    Purchased on November 8, 2024

    5/5

    This is my first time buying a refurbished phone and I got to say at first I was worried that I would get scammed but after getting the iPhone 12 mini green I'm in love with it, it has a few scratches here and there but nothing to bad. I would highly recommend back market for your next upgrade

    Reviewed in the United States on December 9, 2024

    iPhone 12 mini 64GB - Green - Unlocked
  • E

    Erin W.

    Purchased on October 19, 2024

    5/5

    I’m happy with my new iPhone 15! It’s in good shape and it doesn’t have any outside flaws that I can see with my naked eye ( although I did get excellent condition). Though I’m not impressed with the battery capacity ( 87% ) it still holds charge good. It’s what i expected refurbished, and I’d buy from here again!

    Reviewed in the United States on December 9, 2024

    iPhone 15 256GB - Black - Unlocked - Dual eSIM
See all 30,658 reviews

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What's the best place to get a GSM unlocked phone?

We believe that Back Market is the best place to get an unlocked GSM phone because our phones are much cheaper than newer editions, yet still have the same quality that you can expect out of the box.

What does it mean if a phone is unlocked for GSM networks?

It's actually pretty simple, since T-Mobile and AT&T use GSM technology to transmit their cell signals, phones that are able to work with both of these carriers are often called GSM unlocked phones. It's also important to mention that GSM unlocked phones are likely to work on foreign carriers, since most international cell providers also use GSM technology to transmit their cell frequencies.

The Best Deals on Unlocked GSM Phones

We don't mean to brag, but we feel we have some of the best deals on unlocked GSM cell phones. Why do we feel this way? Because our phones have been refurbished, they are just a hair more expensive than regular used phones, but come with the same quality as new devices. Pretty cool, huh?

Unlocked GSM smartphones for sale

Be on the lookout for special events and pay attention to the top featured product on each of our categories, these are most often the best deal according to our algorithm!

More Black Friday savings on smartphones

While you’re doing all your tech shopping this season, keep finding great deals on refurbished devices. Back Market has your back this Holiday season with a 1-year warranty, 30-day money-back guarantee and verified refurbished quality on Black Friday’s most popular phones: