Event Monitor Cyber
EM-20261106-0ZX4 OutageMedium severity

T-Mobile: Messaging Delivery Problems

Nov 6, 2026 · Carrier · reported by Sinch, Twilio, Vonage

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Status
Confirmed

Since : 2 provider status pages acknowledged it.

First Signal
Nov 06 00:58 UTCT20 Sinch status
Page Born
Nov 06 01:23 UTCsecond source joined
Last Signal
Nov 06 02:37 UTC3 hours before snapshot
Sources
33 official · 0 research, news or crowd
Lasted
2 hoursso far

Life Of This Page

  1. 1
    Born
    A second, independent provider or measurement sees it.
  2. 2
    Developing
    Reports and measurements join.
  3. 3
    Confirmed · Now
    A provider status page acknowledges it.
  4. 4
    Resolved
    Not yet
    Every provider marks it resolved and 6 hours pass quietly, or 24 hours pass with no new signal.
  5. 5
    Archived
    Not yet
    30 days after resolved. Read only; the link keeps working. Reopens if it comes back.

The ID never changes, and earlier addresses keep working. A correction is logged, never overwritten. If two pages turn out to be one incident, the later one points to the earlier.

Outage Lifecycle

  1. First Report: reached
    Nov 06 00:58 UTC
    T20 Sinch status
  2. Corroborated: reached
    Nov 06 01:23 UTC
    3 independent sources
  3. Acknowledged: reached
    Nov 06 00:58 UTC
    T20 status page
  4. Network Check: not yet
    Not yet
    No network data for this provider
  5. Restored: not yet
    Not yet
    Still open

Timeline

20:0022:00Nov 602:0004:0006:0008:00BornT20 Sinch statusT17 Twilio statusT21 Vonage status

Point at a mark to read it. Squares are signals, colored by severity; every one is also listed under Signals.

T-Mobile Network During The Incident

0%50%100%Nov 4 23hNov 5 11h

Solid blue line: routes announced. Dashed amber line: networks answering pings. Both as a share of T-Mobile's normal, from C111 IODA, lowest reading in each 2 hours; the shaded band is the incident.

Signals

  1. Twilio: SMS Delivery Delays from Twilio to T-Mobile Czech Republic (opens source in a new tab) identified. Twilio customers may be experiencing SMS delivery delays from Twilio to T-Mobile network subscribers in the Czech Republic. Our team has identified the cause, and is working to resolve the issue. We will prov… Med severityProvider StatusT17 Twilio status
  2. Sinch: Delivery Issue Czech Republic - T-Mobile (opens source in a new tab) investigating. We are continuing to investigate this issue. Med severityProvider StatusT20 Sinch status
  3. Vonage: Czech Republic SMS - Delivery Degradation towards T-Mobile Network (opens source in a new tab) investigating. We are currently observing SMS delivery degradation towards Czech Republic T-Mobile. We are working with our carrier partners to resolve the issue and will issue an update as soon as more information becom… Med severityProvider StatusT21 Vonage status
  4. Twilio: SMS Delivery Delays from Twilio to T-Mobile Czech Republic (opens source in a new tab) identified. Twilio customers may be experiencing SMS delivery delays from Twilio to T-Mobile network subscribers in the Czech Republic. Our team has identified the cause, and is working to resolve the issue. We will prov… Med severityProvider StatusT17 Twilio status
  5. Twilio: SMS Delivery Delays from Twilio to T-Mobile Czech Republic (opens source in a new tab) investigating. Twilio customers may be experiencing SMS delivery delays from Twilio to T-Mobile network subscribers in the Czech Republic. Our team is actively investigating this issue. We will provide another update in … Med severityProvider StatusT17 Twilio status
  6. Sinch: Delivery Issue Czech Republic - T-Mobile (opens source in a new tab) investigating. We are currently observing delivery issues in Czech Republic - T-Mobile Incident Start Time: 2026-11-06 00:30 UTC Impact: Delayed MT's/Delayed MO's/Missing delivery receipts/Late delivery receipts We will … Med severityProvider StatusT20 Sinch status