iOS 8 T-Mobile WiFi Calling iPhone 5S : Outgoing calls fine, incoming calls go directly to voicemail.

iOS 8 T-Mobile WiFi Calling iPhone 5S : Outgoing calls fine, incoming calls go directly to voicemail.

Spent a good part of the morning on my landline phone troubleshooting this issue with T-mobile. (Up front, I'm a Mac consultant & very tech savvy. I get paid to troubleshoot. lol)

Bought a new iPhone 5S yesterday from the T-mobile store, just so I could use WiFi calling, seeing how it won't work on any iPhone below that model. I found out the hard way. 😉

Came home. Put my iPhone 5S into recovery mode & clean installed iOS 8. Set up my device as new. Installed apps, music, etc. Put my old sim card from my iPhone 5 into the 5S, placed a few LTE calls, then turned on WiFi calling. Placed a few calls. Seemed everything as working okay. Proceeded to work on setting up all my apps, and get my phone back to "my normal". Around 2 AM I backed up my phone in iTunes. Went to bed.

Fast forward to today. Turn my iPhone 5S on. See it's still connected to WiFi Calling. Go about business. I get a Notification ... "You have voicemail." Okay. I return the call. No problem. Fifteen minutes later. Another voicemail Notification. Huh? My phone was right next to me, didn't hear it ring or vibrate. I checked that the phone was not on Silent Mode, the Silent switch was not on, not in Airplane mode etc etc.

Pick up my landline & call my cell. Goes direct to voicemail. Huh? I turn off WiFi altogether & call the iPhone. Straight to voicemail, even though I have a 4G signal. I go back into Settings & turn off the WiFi Calling switch, to be certain I didn't find some odd software bug. Call my iPhone again. Voicemail. My phone can no longer receive calls on 4G, or LTE even with 2 bars. It's all I've ever needed.

I call T-mobile from my landline. They check everything on their end. I'm provisioned properly. I pull my sim, read back the serial number on it. It's all good. The sim is also new enough for WiFi calling. The rep calls my iPhone, goes to voicemail. She asks me to reset my iPhone 5S COMPLETELY. Begrudgingly, I do. Once reset and generically configured, she calls me & the call comes through on 4G. WiFi is on and I am connected to my WiFi network but WiFi calling is off, and not yet configured.

I turn on WiFi Calling again. I call the rep from my iPhone 5S, no problem. She can not call me, she goes to my voicemail. I wipe & reset the phone AGAIN. Once I'm back at the Home screen, she calls me via 4G. I can call out. She escalates the ticket & says I'll get a call back on Sunday to see what they come up with. So I wait.

While waiting, I turn WiFi Calling on again. Same problem. I then take my sim out of the 5S & put it back into my 5 which was just wiped and generically set up. I wanted to see if it was a hardware issue. I put the sim in the 5, get a 4G signal & call my iPhone 5 from my landline. Direct to voicemail. So whatever info is sent to T-mobile over WiFi with WiFi calling enabled on the 5S, remains that way until the 5S is wiped and reconfigured.

I have since wiped the iPhone 5S, did the initial set up & let iTunes configure it from my last "my normal" backup. The phone is working fine now if I DON'T turn on WiFi Calling.

As it sits right now, I'm waiting for a call back to see what may be going on on T-mobile's end as they investigate.

I just posted this to see if anyone else had had similar problems. (Sorry if it's too detailed. lol)

BTW ... I will also send this same post to Apple too & see if I get a response. I've also decided to call Apple tech support too, since this is a NEW phone. I'll report back.