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Before you buy an unlocked phone or move your number, check the exact device’s IMEI with the carrier you plan to use, confirm it is actually unlocked, and verify the services and SIM type you need. “Unlocked” means the phone is not restricted to one carrier; it does not guarantee that its hardware or software works fully on another network.
Check the exact phone with the carrier before you pay
Start with the destination carrier’s Bring Your Own Device (BYOD) compatibility checker. You need the phone’s exact model or variant and its IMEI—not just its brand or family name. Different regional or carrier variants of the same phone can have different network capabilities. T-Mobile says its IMEI checker assesses device capabilities and compatibility; AT&T and Verizon also provide BYOD guidance and eligibility checks.
- Ask the seller for the exact model number and regional variant.
- Ask for the IMEI and enter it in the intended carrier’s checker before buying. If the seller will not provide it, ask whether you can verify compatibility before the return period ends.
- Read the result closely. A carrier may distinguish full from partial compatibility, or may not guarantee functionality or performance for a phone it did not sell. T-Mobile notes that partial compatibility can mean reduced coverage or slower speeds.
An IMEI result is a useful eligibility check, not a promise of identical performance everywhere. T-Mobile describes limitations on what it can guarantee for non-T-Mobile devices in its BYOD compatibility guidance.
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Verify the phone is unlocked—and know when it will be
Ask the carrier the phone is currently associated with to confirm its unlock status. A seller’s description is not a substitute for checking with the carrier. If the phone is still locked, ask whether it qualifies for unlocking and how long the process will take; do not assume it can be unlocked immediately.
#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.
Unlocking removes a carrier restriction, but it does not add missing radio hardware, frequencies, or network features. The carrier-published Consumer Code for Wireless Service puts the distinction plainly: “Unlocking a device will not necessarily make a device interoperable with other networks; a device designed for one network is not made technologically compatible with another network merely by ‘unlocking’ it.” Verizon also notes that eSIM activation after unlocking an unlocked phone can take up to 24 hours; check its BYOD FAQs for the applicable activation details.
Check network support and the services you rely on
Even when a checker accepts a phone, confirm that it supports the destination network’s relevant frequencies and technologies, and the services you need. Pay particular attention to voice service and VoLTE, as well as data and any carrier-specific features that matter to you. T-Mobile’s BYOD guidance calls out frequency and VoLTE considerations; a device that works for some uses may still have reduced coverage, speed, or feature support.
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)
Think about where and how you use the phone: coverage at home, work, and regular travel locations can matter more than a general compatibility label. Compare the carrier’s coverage information for those places, and treat the checker’s result as an eligibility signal rather than a guarantee of performance. If you depend on a specific feature, ask the carrier whether it works on that exact model variant.
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Check whether the phone and destination carrier support the activation method you intend to use: a physical SIM or eSIM. Then follow the carrier’s instructions for that device and line. Do not assume that eSIM support on the phone guarantees immediate activation; timing and requirements can differ by carrier and device.
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.
Before starting, confirm how the carrier handles number transfer and what information it needs from your current account. Keep the old service active until the new line is working and, if you are transferring your number, the transfer has completed. Cancelling too early can disrupt service or complicate the move.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Back up your data and compare the plan separately
Back up the phone before changing service or moving a number. AT&T’s BYOD guidance includes backing up data as part of switching preparation. Follow the backup method appropriate to your phone, and make sure you can access important account credentials before beginning activation.
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.
Compatibility and plan suitability are separate decisions. Once you know the phone can use the network, compare the destination plan’s terms and features with your needs; a compatible handset does not establish that a plan is available or right for you.
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.
Use this checklist before buying or switching
- Get the exact phone model, regional variant, and IMEI from the seller or current owner.
- Run the IMEI through the destination carrier’s BYOD checker and note whether it reports full or partial compatibility.
- Confirm the phone’s unlock status with its current carrier. If it is locked, verify eligibility and the expected unlock timing before setting a switch date.
- Check supported network frequencies and technologies, voice, data, VoLTE, and any carrier features you need.
- Review coverage where you use the phone and confirm the intended physical SIM or eSIM activation process.
- Back up your data, follow the new carrier’s activation and number-transfer instructions, and keep the old service until the new line is working.
- Review plan terms separately from device compatibility.
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.
