For my SM-P550 (Samsung Galaxy Tab A with S Pen 9.7") the key combination is Volume Down button, Power button, and Home button for 10 seconds. - Silver Sagely Dec 5 '18 at 16:06. 2. This worked with my son's SM-380 tablet. It certainly beats waiting for the battery to run dead!. 2 Using Your Samsung Galaxy Tab as a Phone Other Sections. Questions & Answers Tips and Warnings Related Articles Authored by the wikiHow Community. Community of editors, researchers, and specialists. April 24, 2017. X. wikiHow is a "wiki," similar to Wikipedia, which means that many of our articles are co-written by multiple authors.. Samsung Galaxy TAB 2.