The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Check two things separately before buying or activating a discounted phone: whether it is unlocked, and whether your carrier will accept that exact device. An unlocked phone is not automatically compatible with every network. The most reliable first step is to get the phone’s exact model and IMEI, then use the intended carrier’s official compatibility checker. For an iPhone, also check Settings > General > About > Carrier Lock: “No SIM restrictions” means it is unlocked.
Unlocked and compatible mean different things
A carrier lock restricts a phone from being activated on another carrier. Compatibility is about whether the phone’s hardware and software can work on the destination network. An unlocked phone can still be rejected or have limited service if its model variant lacks the required bands or features, or if the carrier has blocked it.
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The FCC explains that even phones using the same air-interface technology may not be compatible when networks use different spectrum bands. Check the exact model rather than relying on a family name such as a phone’s marketing name. Carrier-branded and international variants can differ.
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- Find the exact model and IMEI. Ask the seller for the model number or variant and the device’s IMEI. On many phones, dialing *#06# displays the IMEI; it may also appear in the device settings. A dual-SIM phone can have more than one IMEI, so follow the checker’s instructions. For example, Spectrum tells customers with dual-SIM devices to enter IMEI1.
- Open the destination carrier’s official BYOD checker. Enter the IMEI for the phone you are considering, not an IMEI from a similar model. T-Mobile describes its IMEI check as its fastest and most accurate way to assess compatibility and check whether a device is locked or unlocked. Its results can include compatible, blocked, or unknown.
- Read the result as an eligibility check, not a service guarantee. A carrier’s acceptance does not establish that you will get the same coverage, speed, call quality, or features as with a phone sold by that carrier. Check local coverage and confirm that the phone supports the services you need.
Official checkers: T-Mobile IMEI checker, Spectrum Bring Your Own Device, and Rogers Bring Your Own Device. Rogers is a Canadian carrier; procedures and eligibility vary by country and carrier.
#1 Best Overall
- YOUR CONTENT, SUPER SMOOTH: The ultra-clear 6.7" FHD+ Super AMOLED display of Galaxy A17 5G helps bring your content to life, whether you're scrolling through recipes or video chatting with loved ones.¹
- LIVE FAST. CHARGE FASTER: Focus more on the moment and less on your battery percentage with Galaxy A17 5G. Super Fast Charging powers up your battery so you can get back to life sooner.²
- MEMORIES MADE PICTURE PERFECT: Capture every angle in stunning clarity, from wide family photos to close-ups of friends, with the triple-lens camera on Galaxy A17 5G.
- NEED MORE STORAGE? WE HAVE YOU COVERED: With an improved 2TB of expandable storage, Galaxy A17 5G makes it easy to keep cherished photos, videos and important files readily accessible whenever you need them.³
- BUILT TO LAST: With an improved IP54 rating, Galaxy A17 5G is even more durable than before.⁴ It’s built to resist splashes and dust and comes with a stronger yet slimmer Gorilla Glass Victus front and Glass Fiber Reinforced Polymer back.
Verify the phone is actually unlocked
iPhone
On the phone, go to Settings > General > About and find Carrier Lock. If it says “No SIM restrictions,” Apple identifies the iPhone as unlocked. If it is locked, Apple says only the current carrier can unlock it; contact that carrier rather than Apple.
Apple: How to unlock your iPhone for use with a different carrier
Rank #2
- Please note, this device does not support E-SIM; This 4G model is compatible with all GSM networks worldwide outside of the U.S. In the US, ONLY compatible with T-Mobile and their MVNO's (Metro and Standup). It will NOT work with Verizon, Spectrum, AT&T, Total Wireless, other CDMA carriers, it is also not compatible with their MVNO (Visible, Xfinity Mobile, US Mobile, Cricket Wireless, etc).
- Compatibility with certain third-party devices and accessibility accessories, including some hearing aids, may vary depending on manufacturer support, Bluetooth protocols, software compatibility, and regional firmware limitations. For additional hearing aid compatibility information, please refer to Samsung’s official support documentation.
- 4G LTE Bands: B1/B3/B5/B7/B8/B20/B28/B38/B40/B41
- Display: Super AMOLED, 90Hz, 800 nits (HBM) | 6.7 inches, 110.2 cm2 (~86.0% screen-to-body ratio) | 1080 x 2340 pixels, 19.5:9 ratio (~385 ppi density)
- Camera: 50 MP, f/1.8, (wide), 1/2.76", 0.64µm, AF | 50 MP, f/1.8, (wide), 1/2.76", 0.64µm, AF | 2 MP, f/2.4, (macro)
Other phones
Menu names and unlock indicators vary by manufacturer and software version. Ask the seller to demonstrate the status or confirm it with the original carrier. Do not treat “it can be unlocked later” as proof that it is unlocked now. Even a successful compatibility check does not, by itself, prove the phone is free of a carrier lock.
Check account eligibility, blocks, and your return options
If the phone is still tied to an original carrier account or has an unpaid balance, it may not qualify for unlocking. Requirements are carrier-specific. AT&T’s policy, for example, includes conditions involving payment, time since purchase, lost-or-stolen or fraud status, and account standing; its prepaid requirements differ. That policy is an example, not a rule for other carriers.
Rank #3
- Please note, this device does not support E-SIM; This 4G model is compatible with all GSM networks worldwide outside of the U.S. In the US, ONLY compatible with T-Mobile and their MVNO's (Metro and Standup). It will NOT work with other CDMA carriers, and it is also not compatible with their MVNO (Visible, Xfinity Mobile, US Mobile, Cricket Wireless, etc).
- Compatibility with certain third-party devices and accessibility accessories, including some hearing aids, may vary depending on manufacturer support, Bluetooth protocols, software compatibility, and regional firmware limitations. For additional hearing aid compatibility information, please refer to Samsung’s official support documentation.
- Camera: 50 MP, f/1.8, (wide), 1/2.76", 0.64µm, AF | 50 MP, f/1.8, (wide), 1/2.76", 0.64µm, AF | 2 MP, f/2.4, (macro). Battery: 5000 mAh, non-removable | A power adapter is NOT included.
Ask the seller whether the device is paid off and whether the original carrier confirms it is eligible for unlocking. Also ask whether it has been reported lost or stolen. Rogers provides lost/stolen status guidance in Canada, but there is no universal blacklist-check process established for every carrier and market.
When buying remotely, ask for the IMEI and proof of unlock status before paying. If the seller will not provide them or demonstrate the status, treat eligibility as unconfirmed and make sure you can return the phone if the carrier rejects it. The sources cited here do not establish a universal pre-purchase checker or a general right to return a phone for this reason.
Rank #4
- Charger NOT Included, 6.7" Super AMOLED FHD+, 90Hz Refresh Rate, 385 ppi, 800 nits (HBM), 1080x2340px, 5000mAh Battery
- 128GB, 4GB RAM, microSDXC, Exynos 1330 (5nm), Octa-Core, Mali-G68 MP2 or Mali-G57 MC2 GPU
- Rear Camera: 50MP, f/1.8 (wide) + 5MP, f/2.2 (ultrawide) + 2MP, f/2.4 (macro), LED flash, panorama, HDR; Front Camera: 13MP, f/2.0, Android 14, up to 6 major Android upgrades, One UI 6.1
- 3G: HSDPA 850/900/1700(AWS)/1900/2100; 4G LTE: 1/2/3/4/5/7/12/13/14/20/25/26/28/29/30/38/39/40/41/48/66/71, 5G: 2/5/25/41/66/71/77/78 SA/NSA/Sub6/mmWave - Nano-SIM + eSIM
- US Model – Global Connectivity – Compatible with Most GSM Carriers like T-Mobile, AT&T, MetroPCS, etc. Will Also work with CDMA Carriers Such as Verizon, Straight Talk.
AT&T device unlock requirements
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Confirm the features you need will work
Before committing, check the carrier’s requirements for the specific model and your intended use. Confirm supported bands, voice and data service, and whether you need eSIM, a physical SIM, or both. Check coverage where you will use the phone. A compatibility result does not promise identical performance or every feature, especially for a third-party handset.
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For U.S. buyers, start with the intended carrier’s checker and support page; carrier requirements and checker results can change. If comparing carriers, check the exact model with each one rather than assuming a pass on one network applies to another.
Quick Recap
Best Value
- GSM Unlocked: Enjoy seamless connectivity with your preferred GSM carrier. Compatible with T-Mobile, Metro PCS, AT&T, Cricket, Mint Mobile and other GSM networks. SIM card not included. For network compatibility, please check with your carrier. Note: Not compatible with CDMA networks like Verizon (Visible, Spectrum Mobile, US Mobile, Total Wireless, Straight Talk Wireless)
- Boundless Views: Enjoy immersive viewing on the spacious 6.5” HD+ display. Whether you're watching videos, browsing, or gaming, every detail comes through with stunning clarity.
- Smooth Performance, All Day: Powered by an efficient octa-core processor, the G35 ensures smooth performance for your everyday tasks. Enjoy faster app launches, seamless multitasking, and reliable speed.
- Snap, Share, Repeat: The G35 features a dual rear camera setup for sharp, detailed shots, and a front-facing camera that’s perfect for selfies and video calls. Capture every moment with ease and clarity.
- Effortless Access: Keep your phone secure with A.I. Face ID technology. Instantly unlock your G35 with just a glance. It's fast, easy, and secure.
T-Mobile BYOD guide · Verizon BYOD FAQs
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
