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Sprint 2017 handset SRLTE mode survey/discussion


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Many Sprint 2017 handsets operate in continuous SRLTE mode.  For the uninitiated, SRLTE means that the handset is camped on both CDMA1X and LTE simultaneously, using LTE primarily but also monitoring CDMA1X every few seconds per the slot cycle index.  Some Sprint handsets prior to 2017 would fall back to SRLTE mode in areas of low signal.  More recent handsets, however, operate continuously on SRLTE.  The easiest way to check for SRLTE is to use SignalCheck Pro -- if it constantly displays both CDMA1X and LTE signal metrics, then the handset is in always on SRLTE mode.

To gather further info on what appears now to be permanent SRLTE operation and to allow for discussion of the advantages/disadvantages of SRLTE, we have opened this thread with an informal poll:

Does your Sprint handset operate continuously in SRLTE mode?  If so, what year, make, model?  Also, does the handset require a new ISIM, as there may be correlation between SRLTE and ISIM?

Lastly, lest this get confused with SVLTE, VoLTE, or Calling Plus, SRLTE is not connected directly with any of the aforementioned, nor does SRLTE enable simultaneous voice and data.


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Samsung Galaxy S8 - 2017 - uses ISIM

Motorola Moto G 4 Play - 2016

LG X Power- 2016

All show 1xrtt and LTE signal simultaneously in SignalCheck Pro.

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I think all Apple CDMA enabled iPhones sold in the past few years use SRLTE by default.  Apple patented their implementation of SRLTE a few years ago which may be a little different than the way other phones use SRLTE.

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