{"id":254,"date":"2012-09-04T12:43:42","date_gmt":"2012-09-04T17:43:42","guid":{"rendered":"http:\/\/installingcats.com\/?p=254"},"modified":"2012-09-04T12:43:42","modified_gmt":"2012-09-04T17:43:42","slug":"fix-unlocked-iphone-3gs-random-signal-drops","status":"publish","type":"post","link":"https:\/\/installingcats.com\/2012\/09\/04\/fix-unlocked-iphone-3gs-random-signal-drops\/","title":{"rendered":"Fix unlocked iPhone 3GS random signal drops"},"content":{"rendered":"<p>iPhone 3GS or 3G (software unlocked by redsn0w\/ultrasn0w &amp; similar) going from full signal strength bars to 1 bar to no bars, both 3G signal and wifi, to SEARCHING&#8230; to NO SERVICE, back to full bar signal strength, repeatedly, randomly especially\u00a0with location services \/ GPS running (mouse pointer arrow visible in top right of iPhone screen) <strong>is because you&#8217;re\u00a0using version 6.15.00 modem firmware <\/strong>(commonly called\u00a0a baseband or BB)<strong> on your iPhone 3G\/3GS<\/strong>.<\/p>\n<p><strong>Downgrade iPhone modem firmware to 05.13.04 to fix searching\/no signal iPhone 3GS problems<\/strong> using redsn0w version 0.9.14b2 for OS X or Windows. Instructions and downloads are available from iPhone Dev Team:<\/p>\n<p>&#8211; basic instructions on <a href=\"http:\/\/blog.iphone-dev.org\/post\/25350690843\/0615-fun\" target=\"_blank\" rel=\"noopener\">using redsn0w to downgrade modem firmware from 06.15.00 to 05.13.04<\/a><\/p>\n<p>&#8211; <a href=\"http:\/\/blog.iphone-dev.org\/post\/26534086824\/baseband-freedom\" target=\"_blank\" rel=\"noopener\">updated instructions with 0.9.14b2 version of redsn0w<\/a>.<\/p>\n<p>6.15.00 modem firmware used for software unlocks of iPhones is meant for <strong>iPad<\/strong>, not\u00a0<strong>iPhone<\/strong>. (Find your iPhone 3GS \/ 3G modem firmware version in Settings &#8211;&gt; General &#8211;&gt; About &#8211;&gt; Modem Firmware (near bottom). \u00a0Format is MM.mm.pp.<\/p>\n<p>From my little experience with jailbreaking &amp; software\u00a0phone carrier\u00a0unlock iPhones, using iPad modem software on an iPhone 3GS \/ 3G is <span style=\"text-decoration: underline;\">not<\/span> a good solution. \u00a0Sure, your iPhone 3GS \/ 3G is unlocked, but your iPhone is <em>barely operational, <\/em>constantly dropping and searching for wireless signals during which the iPhone is useless especially when GPS \/ location services functions are running.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>iPhone 3GS or 3G (software unlocked by redsn0w\/ultrasn0w &amp; similar) going from full signal strength bars to 1 bar to no bars, both 3G signal and wifi, to SEARCHING&#8230; to NO SERVICE, back to full bar signal strength, repeatedly, randomly especially\u00a0with location services \/ GPS running (mouse pointer arrow visible in top right of iPhone [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"_links":{"self":[{"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/posts\/254"}],"collection":[{"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/comments?post=254"}],"version-history":[{"count":0,"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/posts\/254\/revisions"}],"wp:attachment":[{"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/media?parent=254"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/categories?post=254"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/tags?post=254"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}