If it's the performance, the Rezound blows away the T bolt. The screens are about the same in direct sunlight but away from that the Rezound is much better on my 48 year old eyes
I agree the speaker for music is weak on my Rezound but for videos, calls and notifications it is annoyingly loud if I keep the volume above half on mine, especially text and email alerts.
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A Rezound phone was used for this TapaTalk Blue post