Frankly speaking, I have enough of my Samsung Galaxy S2 smartphone. True, it does everything from the mundane to the esoteric. I have an app to tune my guitar, an app for star gazing, a posing app for photography, etc. In fact, it has basically replaced my need to use a regular PC other than for serious photo editing purposes.
Turning my attention to feature phones, I am quite taken in by the Nokia Asha 210. This phone runs on the old Nokia S40 platform (not as sophisticated as the Android). As a result, power consumption is very low and the processing speed is supposedly fast (i.e. I haven't bought one to try out yet). I really would want a phone with a battery that lasts for a week based on low usage.
The Asha 210 has a physical keyboard, which is a classic feature to have now that anything retro is in vogue. It has a dedicated button to bring up Whatsapp. Due to this and due to the physical keyboard, it is the ideal phone for heavy texters. It also has a dedicated button to launch the camera, which is great for impromptu shots.
The Asha 210 runs only on 2G and not 3G, but it this is probably alright for text and call purposes, since we are not talking about internet browsing here. It also has WLAN for use on home wifi, which is very handy to have.
Without having tried one and basing on specs alone, I daresay the Asha 210 is quite a good alternative to my smartphone for my text and call purposes. The built-in Whatsapp makes it THE reason to want this phone. If you are interested to get one too, make sure it is the RM-928 variant, which has dual SIM capability and which allows you to charge the battery through the microUSB port.