Haven't seen anyone else mention this issue: When I put a call on speaker, the screen times out after maybe 15 sec, despite the fact that Display is set to 10 min (the highest available) and power saving mode is NOT enabled. Here's the serious problem: the Samsung Galaxy has NO hard buttons except the volume control and the power button. Once the screen goes black, the volume control rocker does NOTHING. The only way to make the screen come back on is to press the power button. THIS INSTANTLY DISCONNECTS THE CALL! This behavior makes the speaker option completely useless. What if I'm on hold for an interminably long period of time and then the recording tells me to press "1." Impossible - I can't get the screen back on. What if, while I'm talking to someone and want to look up any info on my phone. Can't. Today, I tried it again (to be sure) and heard a beep for one of my calendar reminders. Even that didn't bring up the screen. So I said "bye," and pressed the power button. I've read a lot of other posts for different phones that have other hard buttons ("I press the camera button to get the screen back on" is one option I read). The iphone has an extra button on the front for getting the screen back on. Some phones have other types of hard buttons or trackballs or pull-out keyboards. If the Samsung has no such options, then there needs to be something written into the code to handle this! This is NOT a proximity sensor issue. Mine works fine all the time. The screen always comes on as it should when I pull it away from my ear. It's a different issue as soon as I push the speaker button on when on a call. I tried an app called screen on. It works if I'm doing other things but not calls. I enabled it before making a call, put it on speaker and the screen went black in about 10 seconds. I often have to give someone I'm talking to on the phone, another person's phone number. I have to put them on speaker phone, look up a number in contacts and read it out to them. It's impossible and it's affecting our business. Anyone else having this problem? I sure need a solution to this!