{"id":8833,"date":"2016-08-09T12:43:00","date_gmt":"2016-08-09T12:43:00","guid":{"rendered":"https:\/\/tenjin.com\/?p=8833"},"modified":"2026-04-14T07:57:51","modified_gmt":"2026-04-14T07:57:51","slug":"idfa-sends-all-zeros-on-ios-10-devices","status":"publish","type":"post","link":"https:\/\/tenjin.com\/vi\/blog\/idfa-sends-all-zeros-on-ios-10-devices\/","title":{"rendered":"IDFA hi\u1ec3n th\u1ecb to\u00e0n b\u1ed9 s\u1ed1 0 tr\u00ean c\u00e1c thi\u1ebft b\u1ecb iOS 10."},"content":{"rendered":"<p class=\"wp-block-paragraph\">V\u00e0i th\u00e1ng tr\u01b0\u1edbc, Apple \u0111\u00e3 th\u00f4ng b\u00e1o r\u1eb1ng iOS 10 s\u1ebd g\u1eedi to\u00e0n b\u1ed9 c\u00e1c s\u1ed1 0 cho<code data-no-translation=\"\" data-no-auto-translation=\"\">advertisingIdentifer<\/code>tr\u01b0\u1eddng khi ng\u01b0\u1eddi d\u00f9ng thi\u1ebft b\u1ecb \u0111\u1eb7t c\u1edd gi\u1edbi h\u1ea1n theo d\u00f5i qu\u1ea3ng c\u00e1o c\u1ee7a h\u1ecd th\u00e0nh<code data-no-translation=\"\" data-no-auto-translation=\"\">ON<\/code>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Theo s\u1ed1 li\u1ec7u t\u1ed5ng h\u1ee3p c\u1ee7a Tenjin, con s\u1ed1 n\u00e0y t\u01b0\u01a1ng \u1ee9ng v\u1edbi kho\u1ea3ng 15% thi\u1ebft b\u1ecb, trong \u0111\u00f3 IDFA s\u1ebd kh\u00f4ng ph\u1ea3i l\u00e0 m\u00e3 duy nh\u1ea5t cho m\u1ed9t thi\u1ebft b\u1ecb c\u1ee5 th\u1ec3.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/s3.amazonaws.com\/tenjin-blog\/2016\/Aug\/Screen%2BShot%2B2016-08-08%2Bat%2B9.10.21%2BAM.png?ssl=1\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u01b0 t\u00f4i \u0111\u00e3 \u0111\u1ec1 c\u1eadp trong b\u00e0i vi\u1ebft c\u1ee7a m\u00ecnh&nbsp;<a href=\"https:\/\/blog.tenjin.io\/how-tenjins-cookie-technology-will-change-tracking-on-mobile-ads\/?__hstc=105908124.1a56e3730f6f13e43c32fb5b1a8ca535.1695012124209.1695095732931.1695118029670.8&amp;__hssc=105908124.90.1695118029670&amp;__hsfp=2360007836\">b\u00e0i vi\u1ebft g\u1ea7n \u0111\u00e2y nh\u1ea5t v\u1ec1 b\u00e1nh quy<\/a>, IDFA l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng th\u1ee9c ch\u00ednh gi\u00fap c\u00e1c nh\u00e0 qu\u1ea3ng c\u00e1o theo d\u00f5i s\u1ed1 l\u01b0\u1ee3t c\u00e0i \u0111\u1eb7t m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c. Do kho\u1ea3ng 15% thi\u1ebft b\u1ecb s\u1ebd kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c coi l\u00e0 duy nh\u1ea5t, n\u00ean nh\u1eefng thi\u1ebft b\u1ecb n\u00e0y s\u1ebd kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c theo d\u00f5i m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c n\u1eefa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3i ph\u00e1p c\u1ee7a Tenjin v\u1eabn kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi \u0111i\u1ec1u n\u00e0y khi ng\u01b0\u1eddi d\u00f9ng v\u00e0 c\u00e1c m\u1ea1ng qu\u1ea3ng c\u00e1o cho ph\u00e9p s\u1eed d\u1ee5ng cookie \u0111\u1ec3 theo d\u00f5i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac cookie ph\u00e1t huy vai tr\u00f2 quan tr\u1ecdng. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c li\u00ean k\u1ebft URL v\u1edbi t\u00ednh n\u0103ng cookie \u0111\u01b0\u1ee3c b\u1eadt, c\u00e1c nh\u00e0 qu\u1ea3ng c\u00e1o c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c truy\u1ec1n d\u1eef li\u1ec7u ghi nh\u1eadn hi\u1ec7u qu\u1ea3. Gi\u1ea3i ph\u00e1p c\u1ee7a Tenjin s\u1ebd kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi c\u00e0i \u0111\u1eb7t iOS 10 IDFA khi c\u1ea3 ng\u01b0\u1eddi d\u00f9ng l\u1eabn m\u1ea1ng qu\u1ea3ng c\u00e1o \u0111\u1ec1u cho ph\u00e9p s\u1eed d\u1ee5ng cookie \u0111\u1ec3 theo d\u00f5i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec1u n\u0103m \u1ee9ng d\u1ee5ng tr\u00ean web \u0111\u00e3 ch\u1ee9ng minh r\u1eb1ng cookie l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 \u0111\u01a1n gi\u1ea3n v\u00e0 \u0111\u00e1ng tin c\u1eady, gi\u00fap c\u00e1c nh\u00e0 ti\u1ebfp th\u1ecb theo d\u00f5i v\u00e0 n\u1eafm b\u1eaft hi\u1ec7u qu\u1ea3 chi ti\u00eau qu\u1ea3ng c\u00e1o, \u0111\u1ed3ng th\u1eddi v\u1eabn b\u1ea3o v\u1ec7 quy\u1ec1n ri\u00eang t\u01b0 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. Ch\u00fang t\u00f4i tin r\u1eb1ng cookie l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p hi\u1ec7u qu\u1ea3 cho t\u01b0\u01a1ng lai c\u1ee7a qu\u1ea3ng c\u00e1o tr\u00ean thi\u1ebft b\u1ecb di \u0111\u1ed9ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u1eadp nh\u1eadt: Ng\u00e0y 6 th\u00e1ng 9 n\u0103m 2016<\/strong><br>\u2014 Ch\u00fang t\u00f4i \u0111\u00e3 lo\u1ea1i b\u1ecf t\u00ednh n\u0103ng \u0111\u1ecdc cookie th\u00f4ng qua SafariViewController kh\u1ecfi phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t c\u1ee7a SDK iOS, tu\u00e2n theo&nbsp;<a href=\"https:\/\/developer.apple.com\/app-store\/review\/guidelines\/#data-collection-and-storage\">C\u00e1c nguy\u00ean t\u1eafc c\u1ee7a App Store c\u1ee7a Apple<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>A few months ago, Apple announced that iOS 10 will send all zeros for itsadvertisingIdentiferfield when the device\u2019s user sets their limit ad tracking flag toON. According to Tenjin\u2019s aggregate records, this represents ~15% of devices where IDFA will not be unique for a specific device. As I noted in my&nbsp;last post about cookies, the&#8230;<\/p>","protected":false},"author":8,"featured_media":8799,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[8],"tags":[],"class_list":["post-8833","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mobile-marketing-trends"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>IDFA Sends All Zeros | Tenjin<\/title>\n<meta name=\"description\" content=\"Learn why IDFA returns all zeros on certain iOS devices and what it means for mobile attribution and campaign measurement.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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