The M52 is a good phone offset by poor hands-free convenience.
Although the Samsung M520 is a quality phone I find its bluetooth features make me want to go back to my A500. I use my phone daily, 8+ hours. I am active both outside and at my computer, therefore a hands-free connection is a major plus. As comfortable as my headset is I really don't enjoy wearing it non-stop 8-10 hours per day, every day. If sitting in my office at the keyboard I like to pull the bluetooth out of my ear and set it on the desk, ready for a quick plug into the old ear and answer. However, this phone lacks any feature to allow it to ring both at the headset and handset simultaneously. Therefore I either have to wear the headset constantly or go into the setup menu multiple times throughout the day turning the bluetooth on and off. This then also precludes using both hands from continuing to type while I converse on the phone. Although the sound and construction quality of the phone are up what I expect of Samsung, the convenience of using it hands-free is deplorable.
Muskogean
Fort Lauderdale, FL