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Sprint VoLTE Discussion Thread Redux

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It's about time. Hopefully lilotimz or wiwavelength/s4gru can answer, but with eHRPD, can calls hand off from LTE to CDMA? Has Sprint made any progress with this? I noticed that it was mentioned earlier but nobody really got a clear answer.
If that was possible Sprint would have had VOLTE when everyone else did. Their in the same boat as VZW.

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8 hours ago, floorguy said:

WEll I have mixed feelings about it around here... (granted its new, and feelings are usually mixed)

When its working, its AWESOME.. when I am walking and talking and go into a basement while working... JOKE.  Which there is no way to truly fix it, guess it was the same back in the early days of cell phones..

I will say I was on a call, and they were on wifi or some other HD call on theirs.. and the sound was fantastic

I have the same issue on Tmo VoLTE. They sent me a Cellspot.  Sprint customers will need a VoLTE capable Airave or Magic Box for these types of situations if WiFi Calling is not a good option for them. But that won't help you in a client's home in most situations.  I believe Sprint will optimize B26 for better coverage in VoLTE circumstances.

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18 minutes ago, S4GRU said:

I have the same issue on Tmo VoLTE. They sent me a Cellspot.  Sprint customers will need a VoLTE capable Airave or Magic Box for these types of situations if WiFi Calling is not a good option for them. But that won't help you in a client's home in most situations.  I believe Sprint will optimize B26 for better coverage in VoLTE circumstances.

They really just need to drop Qrxlevmin values on B26. When VoLTE goes live, I wouldn’t be surprised if we see Qrxlevmins as low as -130. 

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6 hours ago, S4GRU said:

I have the same issue on Tmo VoLTE. They sent me a Cellspot.  Sprint customers will need a VoLTE capable Airave or Magic Box for these types of situations if WiFi Calling is not a good option for them. But that won't help you in a client's home in most situations.  I believe Sprint will optimize B26 for better coverage in VoLTE circumstances.

what type of "extra" coverage does the magic box give??

And yea I was more referring being in a clients place... Just the other day I was on an empty and in an older home with solid concrete walls... had to call the customer back (who called) after I got upstairs and switched of calling plus..

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what type of "extra" coverage does the magic box give??

And yea I was more referring being in a clients place... Just the other day I was on an empty and in an older home with solid concrete walls... had to call the customer back (who called) after I got upstairs and switched of calling plus..
Indoor coverage

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20 minutes ago, Tengen31 said:

Indoor coverage

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lol isnt that what wifi coverage is for??

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lol isnt that what wifi coverage is for??
Sure, but it helps save battery life. Coverage from the MB will exceed a single wifi access point. It has 2-3x the transmit power, so it'll reach outside the home a bit. It's also useful as a backup if your internet goes out for whatever reason, or if you have visitors who also have Sprint.

In addition, some people don't have home internet, especially if they only have phones (a large percentage of people surprisingly).

I have a MB installed at my parents'. They can only get 3 Mbps DSL for home internet (no cable available), and very very weak B26 without the MB. With the MB they get 30 Mbps, so they rarely use their WiFi anymore.

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I have the same issue on Tmo VoLTE. They sent me a Cellspot.  Sprint customers will need a VoLTE capable Airave or Magic Box for these types of situations if WiFi Calling is not a good option for them. But that won't help you in a client's home in most situations.  I believe Sprint will optimize B26 for better coverage in VoLTE circumstances.


Yep, time to stretch out that B26 as far as possible and make it as useless as possible for data use. Though 26+25 CA would help tremendously in fringy areas where UL on 25 wouldn't work and 26 is too slow on the DL to work.

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If I remember correctly Verizon has phones hold LTE much longer than it would if the phone were just active with data, etc. when a phone is on a VoLTE call, because even at the weakest of signals data can still be transmitted, the data rate is just so low it's not good for anything other than the very low data rates used by VoLTE. I imagine Sprint will do the same with their LTE network. 


Yes that is the typical behavior on Verizon and AT&T. They will hang onto the call until the LTE UL to the site is 100% lost. T-Mobile will try to hand down to UMTS and GSM. (AT&T sets parameters to prevent any hand downs in most places)
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I haven't noticed until now but under access points I'm showing LTE ims as one of the options, is this beginning of VoLTE?

Screenshot_20180226-135838_Settings.jpg

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Anyone with an iPhone on here actually get a call on VoLTE on Sprint?


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Anyone with an iPhone on here actually get a call on VoLTE on Sprint?


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I have once. I had a situation where I was on a WiFi call and walked out of WiFi coverage. I was shifted to LTE. While on that LTE call it dropped. The person called me back and the call was received on LTE. I haven’t been able to duplicate it since.

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The OnePlus 6 can be used on U.S. Cellular thanks to VoLTE. I hope Sprint decides to be as open to non-CDMA phones when they activate VoLTE.

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3 hours ago, Paynefanbro said:

The OnePlus 6 can be used on U.S. Cellular thanks to VoLTE. I hope Sprint decides to be as open to non-CDMA phones when they activate VoLTE.

One plus 6 has CDMA support for BC0 and BC1. That's why it works on US Cellular. It's not because of VoLTE.

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Just now, greenbastard said:

One plus 6 has CDMA support for BC0 and BC1. That's why it works on US Cellular. It's not because of VoLTE.

Oh I didn't realize that! Thanks for letting me know.

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Just now, Paynefanbro said:

Oh I didn't realize that! Thanks for letting me know.

I thought the same thing at first. Seeing as how they left out CDMA BC10 (Sprint) and LTE B13 (Verizon), it's safe to assume US Cellular worked with OnePlus to get this done. I wouldn't be surprised if the phone is sold in US Cellular stores.

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