Companies/Twilio/Incidents

Twilio: Programmable Wireless US East Coast Data Connectivity Issues

Timeline of updates

1. resolved2022-09-02 02:39 UTC

   Upon investigation of the connectivity issues that were observed around Washington DC, Maryland, and North Carolina, it appears to be a result of 3G network shutdown activities surfacing an incompatibility between T-Mobile’s network and some devices. Devices configured as “voice centric” that require a circuit switched (CS) connection over legacy 2G and 3G networks, even while being connected to the 4G LTE network for data, may be unable to connect to the network or maintain a connection if it is handed off to other nodes if they are interacting with a node that no longer supports 3G and 2G is unavailable. Devices may require a modem firmware update to ensure they can continue to connect to T-Mobile’s network after the 2G and 3G networks are shutdown. You may need to consult with your modem provider to determine if you need to update your firmware or how to configure your devices as the 3G, and soon 2G, network is shutdown across the United States. Configuring devices as “data centric”, such as by using a packet switch only (PS-only) mode, should allow your devices to connect and remain connected as the device moves throughout the network. This incident has been resolved.

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