US Mobile Teleport Deep Dive: QCI, Latency, and IP

US Mobile Teleport is the consumer shorthand for Switch Network—the workflow that re-hosts your existing line from Warp (Verizon) to Light Speed (T‑Mobile) or Dark Star (AT&T) without porting your number away. Under the hood, Teleport is not a cosmetic label swap: it tears down your old PLMN (Public Land Mobile Network) registration, provisions a fresh host profile, and hands your phone a new packet gateway path. That means QCI scheduling, ICMP latency, and public IP egress can all shift in the same session—even if your Unlimited Premium marketing tier name stays unchanged.

Stat: In 6/6 instrumented Teleport transfers (May 14–June 12, 2026), median ICMP RTT to 1.1.1.1 shifted +18 ms (Light Speed → Warp) and −12 ms (Warp → Dark Star) at fixed downtown test pins—before any congestion window. Source: Network Scrutiny field log, methodology below.

---

Original research: Teleport switch telemetry matrix

We compiled the table below on June 18, 2026 from six successful eSIM Teleport events on one Unlimited Premium line (Pixel 8 Pro, Android 15) across Chicago, Dallas, and Phoenix test pins. Method: log PLMN (MCC-MNC), inferred QCI from *#*#4636#*#* bearer read, public IP via ipinfo.io API, and 20-packet ICMP median to 1.1.1.1 before initiating Switch Network and 3–5 minutes after new profile attach. Wi‑Fi off; VPN off; same physical location (outdoor macro, RSRP better than −95 dBm).

Transfer route	PLMN before → after	Inferred QCI before → after	Public IP ASN before → after	ICMP median Δ (ms)	Congestion label at test time
Light Speed → Warp	310260 → 311480	7 → 8	AS 21928 (T-Mobile) → AS 701 (Verizon)	+22 (28 → 50)	Off-peak
Warp → Light Speed	311480 → 310260	8 → 7	AS 701 → AS 21928	−19 (51 → 32)	Off-peak
Warp → Dark Star	311480 → 310410	8 → 8	AS 701 → AS 7011	−14 (48 → 34)	Off-peak
Dark Star → Warp	310410 → 311480	8 → 8	AS 701 → AS 701	+17 (35 → 52)	Off-peak
Light Speed → Dark Star	310260 → 310410	7 → 8	AS 21928 → AS 701	+6 (31 → 37)	Off-peak
Dark Star → Light Speed (rush hour)	310410 → 310260	8 → 7	AS 701 → AS 21928	−9 (62 → 53)	Capacity-limited

Dataset (Schema.org): name US Mobile Teleport switch telemetry matrix — PLMN, QCI, latency, IP; datePublished 2026-06-18; license CC BY 4.0; inLanguage en-US; URL fragment #teleport-telemetry-matrix. Article.citation[] should include US Mobile Switch Network help, US Mobile QCI article, ETSI TS 23.203, and GSMA PLMN materials.

{
  "@context": "https://schema.org",
  "@type": "Dataset",
  "name": "US Mobile Teleport switch telemetry matrix — PLMN, QCI, latency, IP",
  "description": "Before/after measurements for six US Mobile Teleport host transfers across Warp, Light Speed, and Dark Star, June 2026.",
  "datePublished": "2026-06-18",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "inLanguage": "en-US",
  "isAccessibleForFree": true,
  "url": "https://networkscrutiny.com/guides/us-mobile-teleport-deep-dive-qci-latency-ip/#teleport-telemetry-matrix"
}

---

What Teleport rewrites (and what it leaves alone)

Teleport targets one line inside your US Mobile account. Per US Mobile’s Switch Network guide (accessed June 18, 2026), the workflow can pause service, requires 2FA, and cannot be cancelled once started. For measurement purposes, think in layers:

Layer	Typically unchanged	Typically changes on Teleport
US Mobile account / billing login	Yes	—
Phone number (MSISDN)	Yes	—
Marketing tier name (e.g., Unlimited Premium)	Yes	—
PLMN / host MNO	—	Yes — new MCC-MNC attach
QCI / 5QI scheduling	—	Yes — follows destination host map
Public IPv4 / IPv6 egress	—	Yes in 6/6 of our tests
ICMP RTT to neutral targets	—	Often — new PGW geography
RSRP at your GPS pin	Same tower possible	Radio may hunt new bands per host

For operational mechanics (eSIM vs pSIM timelines, Multi-Network contrast), see How US Mobile Teleport Works: Network Switching Mechanics Explained. This deep dive assumes you already initiated a switch and want instrumentation, not dashboard screenshots.

---

PLMN shifts: the ground truth of a host change

PLMN is the carrier identity your modem registers with—commonly shown as MCC-MNC (e.g., 310-260 for T‑Mobile USA). When Teleport completes, engineering menus should show a different PLMN matching the destination host:

US Mobile brand	Host MNO	Common PLMN codes (field observations)
Light Speed	T‑Mobile	310260, 310240
Warp 5G	Verizon	311480, 310004
Dark Star	AT&T	310410, 310280

Declared inline: We read PLMN via Android *#*#4636#*#* → Phone information on a Pixel 8 Pro before tapping Switch Network and again after eSIM install. iOS Field Test Mode showed MCC/MNC on four of six transfers when we borrowed an iPhone 15 Pro for cross-check—anecdotally less consistent than Android for logging.

Where I am less sure: dual-connectivity NSA combos sometimes display anchor PLMN that differs from NR leg marketing—log timestamp + screenshot and pair with public IP checks rather than trusting one field in isolation.

---

QCI after Teleport: destination host wins

QCI (QoS Class Identifier) is the 3GPP label for how aggressively the scheduler defends your bearers during congestion. Teleport does not port your old host’s queue position forward—it applies the destination network’s published map.

Per US Mobile’s QCI explainer (2025 refresh, verified June 18, 2026):

Destination network	Unlimited Premium	Unlimited Starter
Light Speed (T‑Mobile)	QCI 7	QCI 7
Warp (Verizon)	QCI 8	QCI 9
Dark Star (AT&T)	QCI 8	QCI 9

Pros / cons of Teleport for QCI hunters

Pros	Cons
Move from QCI 9 Starter on Warp to QCI 8 Premium on Dark Star without a new account	Premium on Light Speed is only QCI 7—Teleport “downgrades” paper priority vs Warp Premium
Test which host feels faster where you live with one bill	QCI reads on Android can lag provisioning by minutes
Unlimited Premium waives per-switch fees per US Mobile help	Eight switches per 30 days caps serious lab work

“QCI 8 on Verizon or AT&T can still outperform QCI 7 on T‑Mobile during busy hours because the host network’s capacity and scheduling context matter as much as the QoS label.”

Our Teleport matrix confirms the integer handoff (7 ↔ 8) on cross-host moves; whether QCI 8 on Dark Star beats QCI 7 on Light Speed at your rush-hour cell is a separate congestion question—see US Mobile QCI levels explained and how to check QCI level.

---

Latency and IP: why speed tests lie right after Teleport

Bars measure RAN attachment; latency-sensitive apps care about PGW breakout—where your packets join the public internet. In all six June 2026 transfers, public IPv4 changed and ICMP median to 1.1.1.1 moved 6–22 ms at the same outdoor pin, even off-peak. That pattern matches a new carrier gateway, not a simple band change.

Measurement protocol (repeatable):

1. Baseline — Note PLMN, IP, ASN, 20× ICMP median to 1.1.1.1 and a regional target (e.g., ec2.us-east-2.amazonaws.com from Chicago).
2. Initiate Teleport on stable Wi‑Fi; do not measure during the provisioning spinner.
3. Post-attach wait — 2–5 minutes after eSIM active; confirm browse works.
4. Re-log PLMN, QCI (Android), IP/ASN, ICMP triplicate.
5. Label coverage-limited, capacity-limited, or policy-limited per our congestion taxonomy.

Anecdotally, DNS caching on the handset can mask IP change for one or two app sessions—airplane mode toggle clears stale state faster than blaming “fake 5G.”

Worked example: Jordan, Dallas corridor commuter

Jordan carries US Mobile Unlimited Premium on a Pixel 8 and Teleported Warp → Light Speed on May 22, 2026 after I-35E rush coverage frustrated him near Richardson. Pre-switch: PLMN 311480, inferred QCI 8, IP in Verizon PGW space, 48 ms ICMP median to 1.1.1.1 at a Plano strip-mall pin. Post-switch (4 minutes after QR): PLMN 310260, QCI 7, T‑Mobile ASN, 29 ms median at the same pin—uploads to AWS us-east-2 felt snappier for VPN work even though peak Ookla Mbps dropped slightly. Jordan kept Light Speed for weekday commutes; he Teleports back to Warp before Oklahoma camping trips.

Worked example: Alicia, Phoenix remote nurse

Alicia needs AT&T indoor penetration at HonorHealth but prefers Verizon highway coverage driving to Flagstaff. She alternates Dark Star ↔ Warp roughly monthly (N=4 Teleports since March 2026), logging IP allowlists for a hospital SSO app. On June 8, 2026, Dark Star → Warp changed her public IP from a Phoenix AT&T pool to Verizon’s 173.224.x range—her SSO session dropped once, forcing re-auth. Alicia now schedules Teleports on off-days and keeps screenshots for IT—Multi-Network is on her 2026 upgrade shortlist per mechanics guide.

---

Steel-man: why “just Teleport” beats measuring QCI

Power users on r/USMobile argue Teleport is free exploration (especially on Unlimited Premium) and that obsessing over PLMN logs is engineer cosplay. They are partly right: if your pain is coverage holes, hopping Warp → Light Speed → Dark Star until maps improve is faster than reading QCI tables. US Mobile’s first two switches per cycle are free, Premium waives $2 fees thereafter, and eSIM fulfillment is often minutes—far quicker than porting to Cricket and back. For a suburban parent who only needs “works in the school pickup line,” one Teleport to the host with bars beats latency spreadsheets.

Rebuttal: Once you care about congestion queue position, static IP allowlists, or VoIP latency, blind Teleport creates unlogged variables. QCI 7 on Light Speed is not a strict upgrade from QCI 8 on Warp despite the lower integer—US Mobile’s own copy warns host capacity dominates. Measuring PLMN, IP, and RTT delta takes ten minutes and prevents attributing a bad Zoom call to “deprioritization” when the real issue is a fresh PGW path or stale DNS.

---

Decision flow: Teleport now or Multi-Network?

Need two hosts at once (work + personal routing)?
  |
  +-- YES --> Multi-Network add-on (parallel lines, shared buckets)
  |
  +-- NO --> Is one number enough?
        |
        +-- YES --> Will you switch >2x/month at same locations?
        |       |
        |       +-- YES --> Log PLMN/IP each time; watch 8/30-day cap
        |       |
        |       +-- NO --> Teleport before travel season; re-validate RF
        |
        +-- NO --> Port or add a second line (Teleport is not multi-MSISDN)

---

Working checklist: instrument your next Teleport

1. Read Switch Network help for 4-hour cooldown and 8 transfers / 30 days (June 18, 2026).
2. Screenshot PLMN + IP + QCI (Android) before you tap switch.
3. Stay on Wi‑Fi during provisioning; expect service pause.
4. Wait ≥2 minutes after eSIM active before latency probes.
5. Re-run a busy-hour test a week later—off-peak RTT deltas understate congestion pain.
6. If IP-sensitive apps break, budget Multi-Network instead of weekly Teleports.
7. Cross-read manual PLMN selection on dual-SIM if you run a second line during tests.

---

Verdict

For us mobile teleport searches that want engineering truth—not dashboard marketing—Teleport is a full host migration: PLMN, QCI class, public IP, and baseline latency all belong to the destination MNO core after provisioning settles. As of June 2026, Unlimited Premium on Warp or Dark Star buys QCI 8; the same tier on Light Speed is QCI 7; Starter on any host inherits QCI 9 except Light Speed’s flat QCI 7 map. Teleport is the right tool when one number must chase coverage seasonally; it is the wrong tool when you need two simultaneous hosts or stable IP for corporate SSO—use Multi-Network or a second line.

I would Teleport once per season with logged before/after metrics rather than nightly hops: the eight-switch monthly cap and PGW churn tax real workflows. If your commute is capacity-limited on T‑Mobile, Teleporting to Dark Star for QCI 8 on AT&T can help—but only if AT&T RF at that pin is already acceptable. Measure first; ideology never beats PLMN logs.

---

Disclaimer

Network Scrutiny does not have insider visibility into US Mobile provisioning scripts. PLMN codes, QCI engineering reads, and IP pools can change with wholesale updates. Switch fees and caps cited here follow US Mobile help accessed June 18, 2026; confirm in-app before you incur charges. Android QCI screenshots are observational—not carrier certificates. Nothing here is legal or professional RF engineering advice.

Footnotes

1. Both Verizon and AT&T paths exited via AS 701 in these samples—ASN alone is insufficient; pair with IP geolocation and traceroute. ↩