Yes the iPhone 12 gets both 5G and 5G+. It should have no issues. I'd contact AT&T and make sure the IMEI is provisioned correctly as sometimes that can cause issues with connecting to 5G. Answer from rja7 on reddit.com
Apple Support
support.apple.com › en-us › 108383
Use 5G with your iPhone - Apple Support
November 5, 2025 - Tap Cellular and then tap Cellular Data Options, or, tap Mobile Data and then tap Mobile Data Options. If you see this screen, your device is 5G capable. Turn on Airplane Mode, then turn it off. If you still don't have 5G service, contact your carrier. If you want to use 5G with Dual SIM on ...
Reddit
reddit.com › r/att › does the iphone 12 get 5g and 5g+?
r/ATT on Reddit: Does the iPhone 12 Get 5G and 5G+?
May 13, 2024 -
Hello everyone! I have a question. I have a family member of mine, on the same phone plan with AT&T, who uses an iPhone 12 pro, and they get 5G and 5G+. They had switched to an eSIM, so I thought if i switched to an eSIM also, it would give me access to 5G and 5G+, instead of 5GE. Do I have access to 5G, but it says 5GE, or is there something else I would need to do?
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Yes the iPhone 12 gets both 5G and 5G+. It should have no issues. I'd contact AT&T and make sure the IMEI is provisioned correctly as sometimes that can cause issues with connecting to 5G.
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3.7 GHz and mmWave 5G, yes, as well as the typical lower bands (n2, n5, n12, n66). No 3.45 GHz support though (you need the iPhone 14 or later for that). Also no n30 support, which is a band AT&T will probably use for 5G down the road.
5g compatibility in iPhone 12 - Apple Community
I purchased iPhone 12 in 2021 December from Amazon. It is mentioning 5g compatibility in product specifications but there is no such option in phone settings. Why apple or Amazon misguiding in this. I just checked as 5g services have just started in my state. More on discussions.apple.com
Canadian iPhone 12 and 12 Pro don't have mmWave 5G (taken from Canadian Apple site)
Only US models support mmWave 5G.
More on reddit.com4G LTE Speed on iPhone 12 Pro/Pro Max vs. 4G LTE Speed on iPhone 11 Pro/Pro Max
Yes, the LTE works better with the 12-series line up. This is probably since it’s a Qualcomm modem and not a Intel-modem. More on reddit.com
Why is 5G so bad on IPhone 12?
First generation 5G More on reddit.com
Videos
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How to enable 5G setting on your iPhone 12 and above - YouTube
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5G Vs 4G LTE iPhone 12 Pro - Much Faster ? - YouTube
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iPhone 12 5G/LTE vs 11 Pro LTE - Real World Comparison! - YouTube
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iPhone 12 Updated Review | Still a good choice? - YouTube
eBay
ebay.com › electronics › cell phones & accessories › cell phones & smartphones
Apple iPhone 12 (5G) 256GB| 128GB| 64GB| GSM+CDMA Unlocked Verizon T-Mobile AT&T | eBay
Apple iPhone 12 (5G) 256GB| 128GB| 64GB| GSM+CDMA Unlocked Verizon T-Mobile AT&T
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Price $204.88
Apple Support
support.apple.com › en-us › 111876
iPhone 12 - Technical Specifications - Apple Support
5G, Gigabit LTE, LTE, VoLTE, and Wi-Fi calling are available in select markets and through select carriers. Speeds are based on theoretical throughput and vary based on site conditions and carrier. For details on 5G and LTE support, contact your carrier and see apple.com/iphone/cellular.
Wikipedia
en.wikipedia.org › wiki › IPhone_12
iPhone 12 - Wikipedia
4 days ago - The Verge called it a "beautiful, powerful, and incredibly capable device", praising the new design reminiscent of the iPhone 5, the speed of the A14 Bionic processor, its 5G capabilities, addition of the OLED display like on the high end iPhones, ...
Quora
quora.com › Should-you-use-or-turn-off-5G-on-the-iPhone-12
Should you use or turn off 5G on the iPhone 12? - Quora
Answer (1 of 7): Not having an active 5G network I can only speculate. Under Mobile Data settings I currently have 4G, 3G and 2G and I can select which option I want. Sometimes if I am in an area with a poor 4G signal I can select 3G and actually ...
Apple
apple.com › newsroom › 2020 › 10 › apple-introduces-iphone-12-pro-and-iphone-12-pro-max-with-5g
Apple introduces iPhone 12 Pro and iPhone 12 Pro Max with 5G - Apple
Apple today announced iPhone 12 Pro and iPhone 12 Pro Max, features 5G and advanced technologies for users who want the most out of iPhone.
Published 2 weeks ago
Apple Community
discussions.apple.com › thread › 254536942
5g compatibility in iPhone 12 - Apple Community
January 8, 2023 - Take this as a learning experience, ... sign out: What to do Before you Sell, Give Away, or Trade In your iPhone or iPad - Apple Support ... The iPhone 12 has 5G capability....
Amazon
amazon.com › Apple-iPhone-Pro-128GB-Graphite › dp › B08PL89SJS
Amazon.com: Apple iPhone 12 Pro Max 5G, US Version, 128GB, Graphite - Unlocked (Renewed) : Cell Phones & Accessories
Buy Apple iPhone 12 Pro Max 5G, US Version, 128GB, Graphite - Unlocked (Renewed): Cell Phones - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
Amazon
amazon.com › Apple-iPhone-12-64GB-Black › dp › B08PP5MSVB
Amazon.com: Apple iPhone 12 (Renewed), 64GB, Black - Fully Unlocked : Cell Phones & Accessories
5G and Face ID are also standard features along with True Tone support for adjusting the white balance to the ambient lighting, and wide color support for true-to-life colors. The iPhone 12 is available in six different colors: White, Black, ...