T-Mobile has had a list of devices on their network that are either ready for Lollipop software updates to roll out or have already received them up for some time now. The last time we looked at the list it contained the top flagships on T-Mobile's network from both 2014 and 2013 which were all confirmed to get the software update to Android 5.0 Lollipop, all except at least one device. The Sony Xperia Z3, which is a current flagship device on the network. That appears to be changing as of now, as the Sony Xperia Z3 appears to be listed along with the HTC One M8, Galaxy Note 4 and other devices.
T-Mobile states that the Sony Xperia Z3 is currently going through manufacturer development for the software, which we know to be true as Sony has already confirmed they're working on it and are close to a release. Surprisingly though, it seems Sony's older flagship model, the Xperia Z1S, is also listed as a device that's currently getting ready for the software upgrade to Lollipop. Earlier Sony had apparently mentioned that no phones that weren't part of the Xperia Z line would be getting updated to Lollipop software, that counts out a lot of phones if true. Thankfully for users, the Xperia Z1S isn't included there as it is an Xperia Z line device, just an older model we wouldn't have expected to be getting the update.
Right now there is no dates listed on when to expect these updates to come through for both Sony phones, but we can't be too far off at this point as Sony had stated initially that the updates would be coming in February. With March already a week in, that time has come and gone and they obviously didn't hit their goal. However, now that T-Mobile is listing those devices on the support page for software updates, perhaps they're getting much closer and we might be able to see these updates head out to devices in the next couple of weeks. If you use a Sony Xperia Z1s or Sony Xperia Z3 on T-Mobile's network, watch those status bars like a hawk for the Lollipop update which seems to be upon us very soon.