Sprint subscribers with affected devices will only lose T-Mobile network roaming. The document still claims Sprint customers will be impacted, but a later section states only those on T-Mobile or Metro by T-Mobile will lose all network connectivity. T-Mobile is required to maintain Sprint's 3G network for three years as a condition of the merger, and presumably, customers with these devices should still be able to connect to that network. The change will also affect Metro and Sprint subscribers, and details there get a bit muddier. We originally thought this was tied to the long-awaited mandatory VoLTE support associated with T-Mobile's legacy network shutdown, but the company tells us that isn't the case - though the timing and details remain suspicious. However, the inclusion of the Arlo security camera and R11 e-LTE6 are odd, for reasons we'll touch on later.Ĭonnected to the list is a longer text that explains the devices are being left behind due to their inability to receive an update required for continued functionality on T-Mobile's network, following a network change. These are devices that stopped getting official updates a long time ago, and even excluding this end of carrier support, it's in these customers' best interests to upgrade to something with more recent security patches. The majority are from 2014-2015, though the Huawei P9 landed in 2016. Most of the devices T-Mobile lists as being left behind are quite old in smartphone terms. It is also possible other devices not on this list may be affected. Note that although the AT&T and Verizon Note 4 are affected, the T-Mobile version of the phone is not. According to the documents sent to us (which we have verified as accurate), the following devices will be unable to use T-Mobile's network as of January 29th, following the deployment of a network update:

T-mobile sim not supported