Ive went to target, Walmart, and best buy but they only carry the lower tier brands and not the major brands such as Tmobile, ATT, verizon.​

⚠️ DISCLAIMER: I am not responsible for any damage, data loss, or bricked basebands. Modifying carrier profiles involves system-level changes.** Always verify terminal commands yourself before blindly copying and pasting them from a Reddit post**! Proceed at your own risk.

🏆 CREDITS: A huge shoutout to u/Admirable-Meeting-90 for figuring out the specific GID/ICCID override method that tricks iOS into favoring the Wholesale bundle, and for creating the developer fork of CarrierSIM that makes this possible! Also, full credit to Vladimir B (vlw) for creating the original CarrierSIM project.

If you are using Google Fi on an iPhone, you know that Fi defaults to Apple’s generic TMobile_MVNO_US (or fallback Carrier) bundle. Because of that, you miss out on the 5G UC (Ultra Capacity) network indicator and the 5G Standalone (SA) toggle is normally locked out.

After extensive testing with CarrierSIM v7 on an iPhone 17 Pro (iOS 27.0.1) in a Dual-SIM setup (MetroPCS + Google Fi), I finally got both 5G UC and 5G Standalone unlocked and active!

The Plot Twist: Why a Fresh eSIM Provisioning Mattered
On my original Google Fi eSIM, applying the TMobile_Wholesale_US profile immediately unlocked 5G UC, VoLTE, and VoWiFi registration, but the 5G Standalone toggle in iOS Settings stayed greyed out with:
"Your current SIM does not support 5G Standalone. Contact your carrier for more information."

Diagnostic logs from CommCenter showed 5G SA: disabled (baseband), meaning the older eSIM lacked the SA entitlement bit from Google Fi's servers. However, after briefly moving my line to an Android device and transferring back to the iPhone 17 Pro—which forced Google Fi to generate and download a brand-new eSIM (new ICCID)—reapplying the TMobile_Wholesale_US profile unlocked 5G Standalone immediately after a single-SIM reboot!

Step-by-Step Guide (Including Dual-SIM Fixes)
If you want to replicate this using CarrierSIM v7 on a Mac, here is the exact workflow that avoids all USB stream drops and dual-SIM rescan errors:
1. Get a Fresh Google Fi eSIM (If 5G SA is Baseband-Locked)
If your current Google Fi eSIM keeps 5G Standalone greyed out even after applying Wholesale, force a fresh eSIM download (re-provisioning via the Google Fi app or transferring back to the iPhone so a new ICCID is issued).
Go to Settings → General → About and verify your Google Fi line says T-Mobile 72.0 (the TMobile_MVNO_US baseline), not the generic Carrier 72.0 profile.
Tip: If you are stuck on Carrier 72.0 after a reset, toggling Airplane Mode won't fix it. Go to Settings → Cellular, tap your Google Fi line, and toggle Turn On This Line OFF and back ON to force CommCenter to reload the SIM.
2. Isolate the Google Fi Line (Crucial for Dual-SIM Users) If you have a second T-Mobile network SIM/eSIM active (like T-Mobile Postpaid, MetroPCS, Mint, etc.), iOS will tangle the carrier bundles in cache during the rescan and throw RuntimeError: The rescan did not resolve an untouched system carrier bundle.
Go to Settings → Cellular and temporarily turn your secondary SIM line OFF so only Google Fi is active.
Turn Wi-Fi completely OFF in Settings → Wi-Fi (prevents macOS Wi-Fi sync from hijacking the USB log stream when CommCenter restarts, which causes GidRescanConnectionError).
Set Settings → Display & Brightness → Auto-Lock to Never and keep the iPhone unlocked on the Home Screen.
3. Clean Up Old Rules & Reset macOS USB
Connect your iPhone to your Mac via USB.
In your Mac Terminal, reset the Apple USB multiplexer so the diagnostic stream doesn't drop mid-run:sudo killall -9 usbmuxd AMPDevicesAgent AMPDeviceDiscoveryAgent

Unplug the iPhone for 5 seconds and plug it back in.
If you previously installed Wholesale on an older Google Fi eSIM, use CarrierSIM's cleanup option (Option 15 / 16 or --undo-gid1 <path-to-old-run>) to purge the old ICCID rule from your catalog first.
4. Install T-Mobile Wholesale (Option 14)
Launch CarrierSIM and select Option 14 (Automatic T-Mobile Wholesale installation · USB only), or run:python3 carrier.py --tmobile-wholesale --sims <your_sim_slot>

Confirm the preview (y). The tool will automatically discover Google Fi's GID1 rule (310240_GID1-4276), qualify your specific ICCID for TMobile_Wholesale_US.bundle, and verify Apple's cryptographic signature.
Note: It will pause for 60–90 seconds while CommCenter restarts. Do not unplug the phone!
Save your runs/ folder! Back up the generated runs/YYYYMMDD-XXXXXX-gid-XXXXXX folder somewhere safe so you can cleanly undo the rule before future iOS updates.
5. Reboot Before Re-Enabling Your Second SIM
Unplug your iPhone and reboot it while your second SIM is still turned OFF (so iOS Dual-SIM restrictions don't block the initial baseband handshake).
Once booted, go to Settings → Cellular → Google Fi → Voice & Data:
Switch from 5G Auto to 5G On (stops the phone from bouncing back to LTE when idle).
Toggle 5G Standalone to ON!
Double-check Settings → Cellular → Google Fi → Cellular Data Network to ensure your APN is still set to h2g2.
Turn your secondary eSIM line, Wi-Fi, and normal Auto-Lock timer back on.
6. Prevent iOS from Reverting Your Profile (DNS Block) Official iOS carrier settings updates will instantly overwrite this custom profile and lock 5G SA again. If you ever get a prompt on your phone to update carrier settings, always tap "Not Now".
To block these updates silently on your home network, blackhole Apple's update servers using Pi-hole or AdGuard Home. For Pi-hole v6, SSH into your server and run:
pihole deny appldnld.apple.com mesu.apple.com
(Note: Blocking mesu.apple.com also blocks standard iOS system update notifications, keeping you safe from accidental OTA updates wiping your carrier bundle).

PSA: Good2Go may or may not close your account when you port out.

I've ported out 2 lines. one auto closed itself, meaning I can still login to that account, but there's no phone nor service connected to that account. The other I didn't check and It billed me about 2 weeks after it was ported out on it's normal billing date.

So If you port out from Good2Go, be sure to remove auto-renewal and remove Credit Card.

Good2go does not seem to be responding. I get put on hold for 30 mins and then forced to leave a voicemail and they will "call me back."

Hey,

Do you think Visible might come up with BLUEDEAL kinda promotion for this black friday? Want to wait for it if they're gonna have it.

Should I switch to the $240/yr plan? Or something else? I understand I may need to port out then back in to get the &240. Is there a good short term port or another year long good plan?

I'm currently using the T-Mobile "experience more" family plan, but need to port out. Would like to get some suggestions which mobile plan would work best for me? I use about 40 GB data monthly and my area coverage is best with T-Mobile or At&t service based on coveragemap website. Preferably, would like to have international roaming available, but I could always get a esim for the country I'm traveling to.

Should I go with US mobile or Mint in this case? And should I be worried about have less data priority?

https://www.walmart.com/ip/Straight-Talk-25-Bring-Your-Own-Phone-Mini-SIM-Kit-Prepaid-Smartphone/5738422774

Is the data prioritization QCI8 like the Total Wireless BYOD plan ? Can it be used in an unlocked Total Wireless iphone that hasn't been used for over 12 months ?

It's like they're being run by a broken AI in India.

The website is riddled with bugs that interfere with signing up, choosing plans and making payments.
Reporting the bugs has no effect.

It appears they're still refusing to reveal which carrier they recently transferred everyone to during their recent 'network upgrade' outage fiasco. Their SIMs indicate we're on the AT&T network now (west coast USA). That's all I know.

Can't add my new phone to my account because the site produces an error message for every IMEI entered, even the IMEI of the phone I'm currently using with the service.

When the phone service (the actual tower communication) is working, it generally works as expected. I suspect that's because it's the one part of the process they aren't in charge of.

Hi,

I'm a noob to the US carrier system. In Australia we don't have a distinction of hotspot data, but it seems to be the case in the US where you might get an unlimited plan but only 10GB of hotspot usage.

How are they detecting hotspot use? I thought it was opaque to the carrier?

Using iPhone.

I asked AI and they told me total wireless.. idk

I will be using 100-200gb a month. I will be tethered to my PC for online gaming (can't have home internet where I am at all) so what ever carrier will give me the most reliable connection and least chance of being depriotized in Connecticut and which ever switches towers the lease since I know in some games when switching cell towers I get dc'd in game.

Ai told me Verizon would put me on a tower and stick me there idk never even heard of total wireless before. Also 4k streaming is important

I was originally going metro until I asked ai

What carriers display your caller ID properly when calling from USA to Europe?

Tello often shows up as a different number every time in Poland, for example. Anyone have a better experience with MobileX or US Mobile? What about Total or Visible?

I ported under their byod $20 promo deal about 2 months ago. For first couple of days the internet speed was really good. Used to Show about 300+ down speed and used to show 5guw constantly by my network. For last couple of weeks the speed is very very bad. Its around 20-25 down and never shows 5g uw, only shows 5g, no matter where i am.

Why is that?

I have iphone 14 pro max and did do network reset couple times from settings as it was suggested in some places.

Another point to consider. Complete list in the comments

If I go with the BYOD plan but then later decide I want to use another carrier's SIM, will I be unable to?

I use QUO and was porting out a cell number I have with them. The receiving telecom service for porting in my number requires the SID service account number. QUO informed me they no longer provide SID account numbers. I will lose my number now which is unacceptable.

I just paid off the remaining balance on my phone with att.

I hear I now need to wait 48 hours before I can get my phone unlocked. How do I do this after the 48 hours?

I want to switch to Metro using this same phone and keep my same number. What is the full process on doing this?

I'm switching from att unlimited elite on my s24u to metro unlimited premium if that mattered

Hi,

I am based out of Canada and will likely be moving to the states in a few months. I currently have a Canadian number from work with all my daily life accounts off of it. I was hoping to have my US friend get a number / sim for me next month that can help me transition off all my Canadian accounts to that number, and act as a few days worth of filler in the US before I get my new US number from work. I will then port it to a long term really cheap secondary line and use my work number as the primary driver in US.

I’m aware of the red pocket $30 annual plan but the GSMA bit is a deal breaker (personal handset not AT&T white listed) hence the need to hunt of a stopgap “temporary” number until I can move to the Res pocket plan (on the new device from work). Could you pls recommend me a cheap plan for the transition? I don’t need many minutes as such.

$10 monthly Starter w/ code FBF10
$20 monthly Premium w/ code FBF20

All networks, taxes and fees included

Line must be a port-in from another carrier. New-number activations are not eligible. Lines ported in from Number Barn or Google Voice are not eligible

Line must be activated within 90 days of purchase. The activated line must not have been active on US Mobile in the last 30 days.

Sale ends 10/20 at 11:59 EST

Also remember this stacks with referral codes which give you $30 towards renewal. Check out [r/USMOBILEREFERRALCODES](r/USMOBILEREFERRALCODES) or [r/MobileReferralLinks](r/MobileReferralLinks) for codes/links people posted. Disclosure: I’m the main mod in both, but I barely post my codes there so it’s not just for my benefit.