I think that you would still end up with the inferior battery life of 4G. That was the killer feature of those phones. Our technology seems to have degraded in that regard over the years.
4G drain faster our batteries but we also now download multiple orders of magnitude more data than we used to with the 5110 (I count voice call as "data"). Videos and advertisements being the usual suspects…
Battery would probably last a lot more if I only play snakes and use the phone app.
