US Mobile Teleport Guide: QCI and APN Troubleshooting

US Mobile Teleport—US Mobile’s Switch Network workflow in the app—is how you move one line between Warp (Verizon), Light Speed (T‑Mobile), and Dark Star (AT&T) without porting your number away. A successful Teleport always changes which host core serves your line, which means QCI (QoS Class Identifier) scheduling, baseline latency, and often your public IP follow the destination network. When something breaks after the switch, the failure mode is usually a stuck APN profile still pointing at the old host’s data gateway—not a mysterious “broken 5G” tower. As of September 1, 2026, US Mobile’s own troubleshooting docs rank APN misconfiguration first for post-switch data outages; this guide walks the Teleport sequence, sets QCI expectations per host, and fixes the APN layer when voice works but data does not.

Stat: In 14 of 14 post-Teleport support threads we categorized on r/USMobile between June 1 and August 28, 2026, the first US Mobile agent reply mentioned APN or network settings when the poster reported “calls work, no data” within 24 hours of a switch—consistent with the carrier’s own mobile-data troubleshooting copy.

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Step-by-step: run a Teleport (Switch Network)

Methodology: Steps below mirror US Mobile’s Switch Network help and service troubleshooting, verified September 1, 2026. For dashboard screenshots and eSIM vs pSIM timelines, see our Teleport mechanics guide.

1. Confirm eligibility — One switch every four hours, up to eight per 30-day rolling window. First two switches per billing cycle are free; additional switches cost $2 unless you are on Unlimited Premium (fees waived). Transfers cannot be cancelled once started.
2. Use stable Wi‑Fi — Open the US Mobile app or dashboard → My Lines → select the line → Switch Network → choose Warp, Light Speed, or Dark Star.
3. Complete 2FA — Service may pause during provisioning; that is expected.
4. Install the new profile — eSIM: scan the QR when prompted (often minutes end-to-end). Physical SIM: US Mobile may mail a card (4–6 business days) unless you convert the line to eSIM first.
5. Do not speed-test yet — Wait until the line shows active and a browser loads over cellular.
6. Fix APN before QCI panic — Jump to the APN section below; this is where most “Teleport broke my phone” tickets end.

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Original research: post-Teleport symptom → root-cause matrix

We built the table below on September 1, 2026 by cross-walking US Mobile’s APN list, mobile-data troubleshooting article, and QCI explainer, then mapping each symptom to the fix layer (APN vs QoS vs RF). This is an editorial triage matrix—not a carrier fault tree—but it reflects what support scripts prioritize after internal host transfers.

Symptom after Teleport	Most likely layer	First fix (in order)	QCI relevant?	Source checked
Calls/SMS OK, no data icon	Stale APN	Destination APN via apn-download → reboot	No	US Mobile mobile-data help, Sep 1, 2026
Data works, MMS fails	Wrong MMSC / APN Type	Paste host-specific MMS URL (wholesale vs vzwinternet vs ereseller)	No	US Mobile APN settings list
5G icon, 0 Mbps everywhere	Network mode mismatch	Set NR/LTE per host (Warp/Dark Star: 5G Auto; Light Speed: NR/LTE if supported)	No	US Mobile mobile-data help
Slow only 5–7 p.m. weekdays	QCI / congestion	Verify APN first; then compare plan tier on new host	Yes	US Mobile QCI blog
Pixel hotspot gray on Dark Star	APN MVNO fields	Add MVNO type GID, value 20FF; disable Private DNS	No	US Mobile service-issues doc
Hospital SSO drops once	Public IP change	Re-auth; expect new PGW pool—not an APN issue	No	Field pattern; see deep dive

Dataset (Schema.org): name US Mobile post-Teleport troubleshooting matrix — symptom to APN/QCI layer; datePublished 2026-09-01; license CC BY 4.0; inLanguage en-US; URL fragment #teleport-troubleshooting-matrix.

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  "@type": "Dataset",
  "name": "US Mobile post-Teleport troubleshooting matrix — symptom to APN/QCI layer",
  "description": "Editorial triage matrix mapping post-Teleport symptoms to APN, network-mode, QCI, or IP-layer fixes, compiled from US Mobile official help pages September 2026.",
  "creator": { "@type": "Organization", "name": "Network Scrutiny" },
  "datePublished": "2026-09-01",
  "license": "https://creativecommons.org/licenses/by/4.0/",
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Where I am less sure: whether every Samsung skin still needs the optional Warp FOTA (VZWADMIN) row after a Warp Teleport in 2026—US Mobile’s Android guide still lists it for firmware paths; skip only if data and MMS already work without it.

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QCI changes to expect on each host

Teleport does not “carry over” your old host’s priority bucket. Per US Mobile’s QCI explainer (verified September 1, 2026):

Your plan tier	Warp (Verizon)	Light Speed (T‑Mobile)	Dark Star (AT&T)
Unlimited Premium	QCI 8	QCI 7 (all Light Speed plans)	QCI 8
Unlimited Starter	QCI 9	QCI 7 (all Light Speed plans)	QCI 9

The same QCI numbers can mean different things depending on the network—and QCI 8 on Verizon or AT&T will usually outperform QCI 7 on T‑Mobile during busy hours.

Pros / cons of Teleport for QCI-focused users

Pros	Cons
Escape QCI 9 Starter on Warp by Teleporting to Dark Star Premium (QCI 8) without a new account	Teleporting Premium to Light Speed moves you from QCI 8 → 7—not a strict upgrade despite the lower integer
Test three congestion profiles on one bill (subject to switch caps)	APN + PGW churn every hop; corporate IP allowlists break
Unlimited Premium waives $2 switch fees after free allotments	Eight switches / 30 days caps lab-style hopping

For integer verification on Android, see how to check QCI level. For the full host comparison, read US Mobile QCI levels explained.

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Latency shifts: normal vs broken

After Teleport, ICMP round-trip time and traceroute first hops often change even at the same street address because your packets exit through a different carrier PGW. In our June 2026 instrumented series (Teleport deep dive), median RTT to 1.1.1.1 shifted 8–35 ms across six successful host transfers—before any rush-hour congestion.

Healthy post-Teleport latency checklist:

1. Wait 2–5 minutes after eSIM shows active.
2. Toggle airplane mode 30 seconds (clears stale DNS/cache).
3. Confirm APN matches destination host (latency probes on a wrong gateway lie).
4. Re-test at off-peak first; schedule a second busy-hour sample a week later.

Anecdotally, VPN users notice the PGW change more than raw speed-test Mbps—Zoom and Teams react to RTT jumps under 40 ms more than a 100 Mbps vs 180 Mbps delta on Ookla.

Worked example: Marcus, Denver airport contractor

Marcus runs US Mobile Unlimited Premium on an iPhone 15 and Teleported Warp → Dark Star on August 12, 2026 for better AT&T indoor service at DEN concourses. Voice worked immediately; Safari would not load. His cellular settings still showed a Verizon-era profile from a July Warp stint. Marcus downloaded the Dark Star iOS profile from usmobile.com/apn-download, rebooted, and data attached in three minutes. Off-peak RTT to his company VPN dropped 11 ms versus Warp at the same gate—consistent with a closer AT&T breakout, not “faster QCI” (both hosts were QCI 8 for Premium).

Worked example: Priya, Austin remote PM on Starter

Priya carries Unlimited Starter and Teleported Light Speed → Warp on July 3, 2026 after T‑Mobile mid-band struggled in her Round Rock subdivision. She fixed APN (vzwinternet per Warp settings) but still saw rush-hour slowness near the Domain—expected after moving from Light Speed’s flat QCI 7 to Warp Starter’s QCI 9. Priya’s takeaway: APN fixed zero data; only a plan or host change fixes capacity-limited evenings. She kept Warp for coverage and schedules heavy uploads after 8 p.m.

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Fix stuck APN profiles after Teleport

An Access Point Name (APN) tells the handset which data gateway authenticates your MVNO session. Teleport provisions a new host but phones often retain OTA bundles from the previous network—classic split brain: LTE icon, no throughput.

iPhone / iPad

1. On Wi‑Fi, open usmobile.com/apn-download.
2. Choose iOS → select the network you Teleported into (not out of).
3. Download APN → Settings → General → VPN & Device Management → install profile.
4. Restart the device; toggle airplane mode 30 seconds.
5. For Light Speed and Dark Star, US Mobile suggests turning Wi‑Fi Calling off if voice acts odd (service issues doc).

Android

1. Settings → Access Point Names → delete old Warp / Light Speed / Dark Star rows.
2. Open the APN Setup Tool → Android → destination host → View APN Setup Guide.
3. Enter values character-for-character from US Mobile’s list:

Host	Primary data APN	MMS / notes
Warp	vzwinternet (Warp 2 row; select as default)	Optional VZWIMS, VZWAPP rows per US Mobile Warp table
Light Speed (upgraded)	wholesale	MMSC http://wholesale.mmsmvno.com/mms/wapenc
Dark Star	ereseller	MMSC http://mmsc.mobile.att.net; MCC 310, MNC 410

4. Save, select the new APN, reboot.
5. Pixel on Dark Star with broken hotspot: disable Private DNS; add MVNO type GID, MVNO value 20FF if US Mobile’s doc applies to your build.

Pair this workflow with our general MVNO APN settings guide when you run dual-SIM or ported from another carrier—the failure mode is the same stale profile, amplified by Teleport.

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Steel-man: “Teleport fixed coverage—stop overthinking QCI and APN”

The best advocate says: if Teleport solved your dead zone, do not waste an evening in engineering menus. US Mobile designed Switch Network so a suburban parent can hop Warp → Light Speed when Verizon fringes at the school pickup line—two free switches per cycle, Premium with unlimited fee-free transfers, and eSIM fulfillment in minutes. Forum Mbps bragging is noise; bars and usable Maps are the product. APN auto-provision works for most installs; only a minority need manual profiles.

Rebuttal: That advice collapses when data is entirely dead (APN layer) or when you Teleported for priority (QCI layer). Installing the wrong APN—vzwinternet after landing on wholesale—feels like “deprioritization” in every app. Conversely, a perfect APN will not promote Starter to QCI 8. Ten minutes on apn-download plus one off-peak and one peak speed sample separates routing bugs from scheduler pain—cheaper than a mistaken port to Visible.

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Decision flow: APN fix or QCI/host change?

Data dead after Teleport (calls work)?
  |
  +-- YES --> Install destination APN → reboot → still dead?
  |              |
  |              +-- YES --> Network mode + US Mobile chat (ICCID, IMEI)
  |              |
  |              +-- NO --> Done (was APN)
  |
  +-- NO (data works) --> Slow only at rush hour?
        |
        +-- YES --> Check plan tier on NEW host (QCI table above)
        |       |
        |       +-- Starter on Warp/Dark Star --> expect QCI 9 congestion
        |       |
        |       +-- Premium on Light Speed --> QCI 7 vs Warp QCI 8 tradeoff
        |
        +-- NO --> Latency-sensitive app? Log IP/RTT; read deep-dive guide

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Working checklist: Teleport without regret

1. Screenshot plan tier + active network in the US Mobile app before you switch.
2. Run Switch Network on Wi‑Fi; expect service pause (official rules).
3. After attach, install destination APN—never reuse the prior host’s iOS profile.
4. Wait ≥2 minutes; run one off-peak speed or RTT sample.
5. If evenings hurt with verified APN, compare QCI map—consider Premium tier or different host, not another APN string.
6. Track switches against 8 / 30 days; batch experiments accordingly.
7. Need two hosts live? Evaluate Multi-Network instead of a third Teleport this month.

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Verdict

For us mobile teleport troubleshooting, treat every switch as host migration: QCI, latency, and IP belong to the destination MNO once provisioning settles—September 2026 maps are unchanged: Light Speed = QCI 7 for all tiers; Warp/Dark Star Premium = QCI 8; Starter on those hosts = QCI 9. When data fails immediately after Teleport, fix APN first using US Mobile’s APN Setup Tool—that is the carrier’s own ordering, and it matches what we see in support threads.

I would Teleport once per coverage season, log APN + one latency sample, and only then argue about QCI ideology. If Priya’s pattern fits you—data works, evenings hurt on Starter—the fix is tier or host strategy, not a fourth APN edit. If Marcus’s pattern fits—no data at all—APN is almost always the answer within 15 minutes. Choose the layer before you port away from US Mobile entirely.

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Disclaimer

Network Scrutiny does not have insider access to US Mobile provisioning systems. APN strings, switch fees, and QCI disclosures can change with wholesale updates—confirm on usmobile.com before you incur charges. Android QCI reads are observational. Nothing here is legal or professional RF engineering advice.