UPDATE: I still haven’t heard back from T-Mobile, but John Legere has confirmed that some customers are having “intermittent calling issues.”

UPDATE 2: T-Mobile posted a tweet on Saturday night apologizing to customers that are having issues with calling and promised that “teams are working to resolve them asap.”

It looks like T-Mobile and its engineers had a bit of a rough start to the weekend, as a nationwide outage affecting VoLTE and Wi-Fi Calling happened last night.

Several folks on Reddit and Twitter reported having issues when it came to making and receiving calls, and T-Mobile’s Twitter account apparently confirmed the issues to one user, saying that “We are experiencing 70% LTE and Wi-Fi calling failures affecting subscribers nationwide.” The support rep said that engineers were working to correct the problem.

@MikeCiferri We appreciate you having to deal with this right now Mike. Right now we are experiencing service issues going on with… 1/3

— T-Mobile USA (@TMobileHelp) February 20, 2016

@MikeCiferri …LTE and Wi-Fi calling. This is affecting everyone, so were working around the clock to make sure we get this up… 2/3 — T-Mobile USA (@TMobileHelp) February 20, 2016

@MikeCiferri …and running as soon as possible. Thank you for your patience in dealing with this. *EmmanuelL 3/3

— T-Mobile USA (@TMobileHelp) February 20, 2016

As of this morning, it looks like many folks are reporting that service is back to normal, but others are still tweeting at @TMobileHelp to say that they’re still unable to make calls. Folks still having problems are being advised to switch off LTE on their phones. I’ve reached out to T-Mobile to get an official update on the outage, but haven’t yet heard back. How are things for you folks? Anyone having issues with VoLTE or Wi-Fi calling this morning?

@TMobileHelp Is there any outage in Dallas area? Calls are not going through at all since last night. — tarek972 (@tarek972) February 20, 2016

@TMobileHelp can’t make phone calls in Romulus or at the Detroit metro airport what’s up? Even restarted device. Data works calls don’t.

— Ryan☀️ (@TheRyGuy86) February 20, 2016

Looks like @TMobileHelp is having a huge #outage right now. Can’t even Wifi text at the moment. What will I do with my life!? =D — Rob Newcomb (@bobbynewco) February 20, 2016

Sources: Reddit, DownDetector