Because of the sound issues (whine / interference when using the analog audio out, also i see now there's a similar sound issue when using the HDMI out , dropping 3G way too often which none of our other phones do, horrible battery life, horrible slow camera <other than slow, whenever the flash was used it made a haze , not sure if that was a common issue or not but it made the already not so great camera just awful> etc.)
Because i so much didn't want to go back to the original Droid (my home button has been out for a while) - I picked up 2 GS 2 Epic Touch's - didn't port out # to test Sprint - the phone , no question the GS 2 really like - though the pentile other than yellow that seemed more like mustard i could deal with it but while it's a lower rez, the 4.5" GS2 display is amazing and in the sunlight b4 we returned the Bionic (I had both the Bionic and the Samsung for a few days to compare b4 the Bionic went back) - the Samsung and Bionic seemed the same in sunlight (just the same as far as affected by sunlight).
The speaker on the Samsung is different than the Bionic, at 1st I didn't think the Samsung's speaker was going to cut it but actually it is louder for voice / podcasts than the bionic while the bionic is better for music - but i wanted a louder speaker for Navigation , podcasts , ring tones and amazed the Samsung is LOUD as the Nexus S and Charge have super low speakers, so that's a real surprise for the better on the Samsung. Negative - while thej samsung takes much better video (no constant auto focus in and out) than the Bionic, the MIC on the Samsung distorts. Still camera shots no comparison, the Samsung takes for a phone amazing pics, even for a lower range digital camera - some pics you'd think were from a dedicated camera - very nice.
The Bionic was snappy, no log, the Samsung though is just as smooth and in a diff way.
Ar 1st the Samsung seemed like chap plastic after having orig Droid and the Bionic but now the Droid seems super heavy and i much prefer the Samsung and while it is really light , thin - it doesn't feel like cheap plastic at all, just light and easy to hold.
My wife and I couldn't ask for more with the Samsung's - there's ONE problem though and it's a HUGE issue, the Sprint network. We are lucky to get 200 kbps down and 75 up! I have a friend with an Evo and it's similar. So it's not an issue with the Samsung, but Sprint in our area (wide area thu the entire city with only a few spots offering 800 up / down). No Wimax avail in our area.
Verizon on the other hand with the Droid - easy always 800+ up / down kbps and with the Bionic 1,800 down and over 1,000 up - when in the area near us with LTE, upwards of 20mbps down.
I'm traveling and in Atlanta and Richmond, VA, 4G Sprint is around 2 mbps down and 1 mbps up - not much faster than what I got with the Bionic Verizon 3G!
Battery life even on 4G is better with the Samsung than the Bionic on 3G, Samsung battery life is great compared to the Bionic but the network is so slow at home - you cannot play Netflix or even HQ YouTube vids w/o constant buffering - just downloading small apps takes forever -something after almost 2 yrs of our VZW android phones my wife and i could not believe how slow Sprint is in our area at least - how can anyone pay $129 for a 2 line plan for such horrible performance??????
If we had Wimax at home as Sprint has here on my trip, i'd keep the Epic Touch's but as much as I love the phones and do not want to be stuck with our Droid and Eris while WAITING for verizon to get a decent phone (Samsung GS2 type such as the Epic Touch - it better have a 4.5" display and LOUD speaker I hope) - we will have to suffer on our slow, old phones and wait for Verizon to have a phone like the Epic Touch (why can't VZW have the Epic Touch!!!!!)
I thought the 4.5" display was going to be too large - for the resolution and the size of the phone but the phone isn't much larger at all than the Bionic, fits well to hold and is light, again , really surprised at how much we love these Samsungs (even latest TouchWiz is OK).
Had the Bionic not had the audio, 3G connectivity, battery, camera focus / flash - issues, i'd have kept it and thought it was a nice phone but after trying the Samsung, no comparison for me anyway, I'm all over the Samsung (HTC seems ok, Evo's of friends , my only Samsung experience- with the ones we are trying).
Still can't believe Sprint! Good thing we dind't port out # and lose our VZW contract (unlimited data).