[T-Mobile Samsung Galaxy S6 Edge] jnp1974:
My issue is NOT app related.

I Factory reset, then ran two days of testing.

After factory reset, I also cleared cache again.

No social media apps configured.

Turned on phone from reset and setup google account only.

No apps installed, aside from factory apps.

My tests are with VoLTE turned off and WiFi calling turned off.

*Day 1 - WiFi off completely*

100% charge at 0700, used it all day at work and home. Cell Standby used 1% total and I ended the day at 2300 with over 50% battery remaining.

*Day2 - WiFi on all day*

100% charge at 0700, used it all day at work and home. Cell Standby used 43% total and my battery died at about 1530.

T-Mobile support stated it was a known issue, Samsung could not "troubleshoot" it properly and just wants me to ship it in for "repair". They did suggest taking my device to a "Samsung Experience Shop" in my local Best Buy. I did and they factory reset the phone. They also informed me that this is an issue with the S6 Edge, and that the factory reset is not going to resolve my issue.

T-Mobile Support Chat:

You :

First Name:

Last Name:

Account Holder Name:

T-Mobile Number: XXXXXXXXXX

Account PIN or SSN: XXXX

Business/Government Account: No

Prepaid Account: No

Reason for Chat: Phones & Devices

What can we help with: Galaxy S6 Edge, "Cell Standby" is draining my battery FAST, if I have WiFi turned on. I have factory reset device, cleared cache, turned off VoLTE, tried with and without WiFi calling turned on, it is ONLY an Issue if I am connected to a WiFi network. Doesn't matter if it's 2.4Ghz or 5Ghz.

T-Mobile : Hi!

T-Mobile : I'm sorry to know if Cell Standby is draining your battery fast when connected to WiFi. I'd be very happy to help you out!

T-Mobile : Is this for line XXXX?

You : yes

T-Mobile : All right, I'm checking on a few things. One moment please.

You : thanks

T-Mobile : You're welcome. May I have your phone's software version please? Here's how to check:

You : 5.1.1

T-Mobile : From the Home screen, tap the Apps icon.

Tap Settings.

Scroll down to 'System,' and then tap About device.

Read the baseband version on the phone.

You : I am on the most recent firmware, based on the T-Mobile support site

T-Mobile : Great! Please bear with me.

You : Baseband is G925TUVU2COF6

T-Mobile : I appreciate that, one moment please.

T-Mobile : Thanks for waiting. I checked on this further and see that this a known issue that Samsung is aware of and is hoping to get fixed by next update.

You : any timeline for this issue resolution? I don't want to use up all my data, just so that my phone will stay powered on for an entire day

You : If I turn off WiFi, my battery performs normally, and can get through about 2 days without charging ... If WiFi is turned on, I can't even get through an entire day

T-Mobile : My apologies but there is no timeline as we speak yet. One recommendation I see here is to turn off Smart Network Switching in your WiFi settings. Here's how:

T-Mobile : From the home screen, tap the Apps icon.

Tap Settings.

Tap Wi-Fi.

Tap MORE.

Tap Smart network switch.

Tap Off.

You : That is turned off

T-Mobile : Oh, I see. I apologize but we'll need to wait until the next update from Samsung. You may contact them directly at (888) 987-HELP (4357).

You : I have ... they stated I needed to send my device in for repair.

T-Mobile : Oh, we are unable to replace the phone since the issue is software related. This all started after the 5.0.1 update.

T-Mobile : This should be addressed by next software release.

You : it started the day I took the phone out of the box, 3 weeks or so ago. Got an update to 5.1.1 in the 2nd week, but the issue remains

T-Mobile : I understand where you are coming from. WiFi bug fix should be included in next software update. We are still standing by for more information from Samsung as to approximate of the release.

You : thank you

T-Mobile : You're welcome! Your patience and understanding is truly appreciated. Anything I may have missed for you today?