I never switched to smartphones to not have internet in my pocket, and so I sticked to Sony Ericsson phones. Currently I use a 2010 Sony Ericsson Elm (J10i) which gives me SMS, phone, camera, and a few utilities : calendar, alarms, calculator, flashlight. Dimensions are 110.00 x 45.00 x 14.00 mm, I recharge once every ten days or so
Well, in comparison with stoicism, epicureanism is more about experiencing pleasure than avoiding pain, given that the latter tries to avoid all feeling. But yeah, they're more fundamentally alike there.