编辑“︁IPhone 4”︁（章节）

=== 技術性問題 ===
* 有些用戶報告指屏幕出現發黃變色，情況於數天後便消失，這歸因於所使用的玻璃層壓膠所致。這是由於製造速度的關係，在該產品到達消費者手上之前，玻璃層壓膠並沒有時間待至完全乾燥<ref name="VB tech issues 1">{{cite web|url=https://venturebeat.com/2010/06/23/iphone-4-problems-crop-up-screen-discoloration-reception-issues-with-antenna-band|title=Apple iPhone 4 problems crop up: screen discoloration, reception issues|first=Devindra|last=Hardawar|date=2010-06-23|publisher=[[Glam Media|MobileBeat]]|accessdate=2010-06-24|archive-date=2019-09-03|archive-url=https://web.archive.org/web/20190903050637/https://venturebeat.com/2010/06/23/iphone-4-problems-crop-up-screen-discoloration-reception-issues-with-antenna-band/|dead-url=no}}</ref>。
* 在iPhone 4發布後幾天內，一些用戶報告的另一個問題是，在通話期間，距離傳感器可能不敏感，因此，觸控屏與面部的接觸會導致終止通話、來電靜音及撥打其他電話號碼<ref name="AI prox sensor 1">{{cite web|url=http://www.appleinsider.com/articles/10/06/28/users_report_issues_with_iphone_4_proximity_sensor_during_calls.html|title=Users report issues with iPhone 4 proximity sensor during calls|date=2010-06-28|publisher=[[AppleInsider]]|accessdate=2010-07-07|archive-date=2019-09-03|archive-url=https://web.archive.org/web/20190903050638/https://appleinsider.com/articles/10/06/28/users_report_issues_with_iphone_4_proximity_sensor_during_calls.html|dead-url=no}}</ref>。
* 一些用戶報告指，特別是在光線不足的情況下，iPhone 4所拍攝的照片有時會出現藍色或綠色的「斑點」。此外還發現到[[色彩平衡|白平衡]]的問題，特別是在使用閃光燈的時候<ref name="smh 20100823">{{cite news|url=http://www.smh.com.au/digital-life/iphone/iphone-4-camera-rendered-useless-by-mysterious-fault-20100823-13ehb.html|work=The Sydney Morning Herald|first=Ben|last=Grubb|title=iPhone 4 camera rendered 'useless' by mysterious fault|date=2010-08-23|accessdate=2019-09-03|archive-date=2017-07-05|archive-url=https://web.archive.org/web/20170705162354/http://www.smh.com.au/digital-life/iphone/iphone-4-camera-rendered-useless-by-mysterious-fault-20100823-13ehb.html|dead-url=no}}</ref><ref name=macworld-cameratint>{{cite web|title=Some iPhone 4 cameras have yellowing problem|url=https://www.macworld.com/article/1152434/iphone4flashissues.html|work=MacWorld|publisher=IDG|accessdate=2013-12-20|archive-date=2019-09-03|archive-url=https://web.archive.org/web/20190903050641/https://www.macworld.com/article/1152434/iphone4flashissues.html|dead-url=no}}</ref>。

==== 天線門事件 ====
在iPhone 4推出後不久，一些消費者報告指，當觸摸手機的左下邊緣時，手機的訊號強度會降低，連接分隔兩個天線的兩個位置之一，導致出現一些訊號於接收較低的區域掉線的問題<ref name="gizmodo reception 1">{{cite web|last=Chen|first=Jason|title=iPhone 4 Loses Reception When Holding it By Antenna Band?|url=https://gizmodo.com/5571171/iphone-4-loses-reception-when-you-hold-it-by-the-antenna-band|publisher=[[Gizmodo]]|accessdate=2010-06-24|date=2010-06-24|archiveurl=https://web.archive.org/web/20100722003653/http://gizmodo.com/5571171/iphone-4-loses-reception-when-you-hold-it-by-the-antenna-band|archivedate=2010-07-22|dead-url=no}}</ref><ref name="TA australia fans">{{cite news|url=http://www.theage.com.au/digital-life/iphone/iphone-4-fault-fails-to-surface-for-sydney-fans-20100730-10zsp.html|title=iPhone 4 fault fails to surface for Sydney fans|date=2010-07-31|accessdate=2010-07-31|work=The Age|location=Australia|first=Melissa|last=Singer|archive-date=2017-09-10|archive-url=https://web.archive.org/web/20170910050020/http://www.theage.com.au/digital-life/iphone/iphone-4-fault-fails-to-surface-for-sydney-fans-20100730-10zsp.html|dead-url=no}}</ref><ref name="BDI reception 1">{{cite web|title=Teste de Recepção do iPhone 4|date=2010-07-19|accessdate=2010-08-09|publisher=Blog do iPhone|url=https://www.blogdoiphone.com/2010/07/inedito-teste-de-recepcao-do-iphone-4-com-as-operadoras-brasileiras|archive-date=2020-05-07|archive-url=https://web.archive.org/web/20200507080454/https://blogdoiphone.com/2010/07/inedito-teste-de-recepcao-do-iphone-4-com-as-operadoras-brasileiras/|dead-url=no}}</ref>。作為回應，蘋果公司發表聲明，建議客戶在撥打或接聽電話時應「避免抓住電話的左下角」<ref name="BBC holding device 1">{{cite news|last=Cellan-Jones|first=Rory|title=Apple issues advice to avoid iPhone flaw|url=http://news.bbc.co.uk/1/hi/technology/8761240.stm|publisher=BBC News Online|accessdate=2010-06-25|date=2010-06-25|archive-date=2012-03-10|archive-url=https://web.archive.org/web/20120310062546/http://news.bbc.co.uk/1/hi/technology/8761240.stm|dead-url=no}}</ref>。-{zh-hans:乔布斯; zh-hant:喬布斯;}-也坦言：「你們手持的方式不對。」消費者報告後來認為蘋果公司可以有更好的解決方式，因此仍不打算推薦iPhone 4。這使蘋果公司的聲譽大受打擊<ref>[http://mag.udn.com/mag/digital/storypage.jsp?f_MAIN_ID=320&f_SUB_ID=2942&f_ART_ID=271585 《消费者报告》：我们还是不推荐iPhone 4] {{Wayback|url=http://mag.udn.com/mag/digital/storypage.jsp?f_MAIN_ID=320&f_SUB_ID=2942&f_ART_ID=271585 |date=20191017123402 }}‧数位资讯 2010/09/15</ref>。美國權威評價機構《[[消費者報告]]》最初指iPhone 4的訊號問題並非「獨特，也可能不嚴重」，它並繼續提到信號丟失是整個智能手機行業面臨的一個問題。他們評定雖然蘋果公司iPhone 4在各方面的設計均相當優異，但因為硬體設計出現瑕疵，天線設計問題，故他們不推薦此款手機，也不建議消費者購買。眼見iPhone 4收訊問題愈演愈烈，蘋果公司沒有回應。

基於這個問題，據報導於2010年7月2日，一群iPhone 4用戶計劃向[[蘋果公司]]及[[AT&T]]作出起訴，控告兩公司欺詐、疏忽，故意虛假陳述和設計缺陷。一所律師事務所設立了一個網站，招募心灰意冷的iPhone 4買家向蘋果公司提出訴訟<ref name="sky sued 1">{{cite web|url=http://news.sky.com/skynews/Home/Technology/iPhone-4-Apple-Is-Sued-After-Complaints-Of-Reception-Problems-With-The-New-Smartphone/Article/201007115658175?|title=iPhone 4: Apple Is Sued After Complaints Of Reception Problems With The New Smartphone|last=Hewage|first=Tim|date=2010-07-02|publisher=[[Sky News]]|accessdate=2010-07-04|archive-date=2010-07-05|archive-url=https://web.archive.org/web/20100705121853/http://news.sky.com/skynews/Home/Technology/iPhone-4-Apple-Is-Sued-After-Complaints-Of-Reception-Problems-With-The-New-Smartphone/Article/201007115658175|dead-url=no}}</ref><ref name="yahoo sued 1">{{cite web|url=https://news.yahoo.com/s/nm/20100701/tc_nm/us_apple_lawsuits|archiveurl=https://web.archive.org/web/20100705181954/http://news.yahoo.com/s/nm/20100701/tc_nm/us_apple_lawsuits|archivedate=2010-07-05|title=Consumers sue Apple over iPhone antenna problems|author1=Madway, Gabriel|author2=Grenon, Andre|date=2010-07-01|publisher=[[Yahoo! News]]|accessdate=2010-07-04|dead-url=no}}</ref>。當天稍後時間，蘋果公司發布了另一份聲明，說它已經發現原因在於「條子戲劇性下降」<ref name = "Statement by Apple on iPhone 4 reception issues"/>。

2010年7月16日，蘋果公司也就這個問題正式道歉，該公司的時任CEO[[史蒂夫·乔布斯|喬布斯]]召開[[記者會]]，宣布免費為全球iPhone 4用戶提供免費保護膠套以解決天線問題，並向已購買保護膠套的用戶退款。提供免費保護膠套有效期至2010年9月30日，屆時蘋果公司將重新評估情況<ref name="NYT free cases 1">{{cite news|url=https://www.nytimes.com/2010/07/17/technology/17apple.html|title=Apple Offers Free Cases to Address iPhone Issue|newspaper=New York Times|date=2010-07-16|first=Miguel|last=Helft|accessdate=2019-09-11|archive-date=2020-05-07|archive-url=https://web.archive.org/web/20200507080519/https://www.nytimes.com/2010/07/17/technology/17apple.html|dead-url=no}}</ref><ref name="MSNSC free bumpers 1">{{cite web|last=Rothman|first=Wilson|url=http://www.msnbc.msn.com/id/38263228/ns/technology_and_science-wireless|title=Apple gives free bumpers to all iPhone 4 owners|publisher=[[MSNBC]]|date=2010-07-17|accessdate=2010-07-17|archive-date=2012-11-04|archive-url=https://web.archive.org/web/20121104163447/http://www.msnbc.msn.com/id/38263228/ns/technology_and_science-wireless|dead-url=no}}</ref>。分析師預測，蘋果所耗費相關成本至少達4,000萬美元<ref>[http://money.chinatimes.com/news/news-content.aspx?id=20100718001354&cid=1207 《国际产业》賈伯斯坦言：iPhone4不完美] {{Wayback|url=http://money.chinatimes.com/news/news-content.aspx?id=20100718001354&cid=1207 |date=20100720224658 }} 2010-07-18 13:27 时报资讯 【时报-台北电</ref><ref>{{cite web |url=http://blog.mcbub.com/index.php/electronics/apple-accessories-geeky-iphone-4-cases-weekly-round-up-919-924/ |title=Geeky iPhone 4 Cases Weekly Round Up |publisher=Blog.mcbub.com |date= |accessdate=2014-03-18 |deadurl=yes |archiveurl=https://archive.today/20120713011424/http://blog.mcbub.com/index.php/electronics/apple-accessories-geeky-iphone-4-cases-weekly-round-up-919-924/ |archivedate=2012-07-13 }}</ref>。若需獲得免費保護膠套，消費者可於2010年7月22日至2010年9月30日在內置於手機中的[[App Store (iOS)|App Store]]應用程式作出申請。喬布斯還宣布蘋果公司無法為所有手機用戶生產足夠的保險槓，但會透過採購供應，並會提供一系列保護膠套<ref name="Apple offers free iPhone 4 cases">{{cite news|title=Apple offers free iPhone 4 cases|url=https://www.bbc.co.uk/news/technology-10665424|publisher=BBC News Online|accessdate=2010-07-19|date=2010-07-16|archive-date=2020-05-07|archive-url=https://web.archive.org/web/20200507080542/https://www.bbc.co.uk/news/technology-10665424|dead-url=no}}</ref>。此外，喬布斯引用[[AppleCare]]的數據顯示，只有0.55％的iPhone 4用戶向該公司抱怨此問題，而到蘋果公司送修的手機數量為1.7％，比在手機發布的首個月內送修的iPhone 3GS型號少了4.3%<ref name="Apple offers free iPhone 4 cases"/>。

2010年7月26日，有不少媒體報道iOS 4於使用[[藍牙]]耳筒或汽車系統時經常斷線，懷疑是操作系統iOS 4的問題後，上述雜誌改變了立場<ref name="CR signal issue 1">{{cite web |url=http://blogs.consumerreports.org/electronics/2010/07/apple-iphone-4-antenna-problems-dropped-calls-att-signals-bars-os-software-bugs-glitches-os-os4-iphone4-reception-problems-in.html |title=Consumer Reports Electronics Blog: iPhone 4's supposed signal woes aren't unique, and may not be serious |publisher=Blogs.consumerreports.org |date=2010-07-02 |accessdate=2010-11-11 |archive-url=https://web.archive.org/web/20101204002618/http://blogs.consumerreports.org/electronics/2010/07/apple-iphone-4-antenna-problems-dropped-calls-att-signals-bars-os-software-bugs-glitches-os-os4-iphone4-reception-problems-in.html |archive-date=2010-12-04 |dead-url=yes }}</ref>。蘋果公司於受控環境中進行測試後，並將結果與前幾代iPhone進行比較。該雜誌拒絕了蘋果公司的解釋，他們諷刺地指出，使用一塊膠帶覆蓋左下方的天線間隙也許是解決這個問題的一種方法，但建議「想要一部沒有遮蔽膠帶修復功能的iPhone」的消費者，只能購買[[iPhone 3GS]]作代替<ref name="consumerreports1">{{cite web|url=http://blogs.consumerreports.org/electronics/2010/07/apple-iphone-4-antenna-issue-iphone4-problems-dropped-calls-lab-test-confirmed-problem-issues-signal-strength-att-network-gsm.html|title=Lab tests: Why Consumer Reports can't recommend the iPhone 4|date=2010-07-12|publisher=[[Consumer Reports]]|accessdate=2010-07-12|archive-url=https://web.archive.org/web/20110219233245/http://blogs.consumerreports.org/electronics/2010/07/apple-iphone-4-antenna-issue-iphone4-problems-dropped-calls-lab-test-confirmed-problem-issues-signal-strength-att-network-gsm.html|archive-date=2011-02-19|dead-url=yes}}</ref>。該雜誌還測試了使用[[保險槓]]的iPhone 4，那是蘋果公司出售的框架狀的保險槓，可防止外界與天線直接接觸，並報告指確實可以解決問題<ref name="CR bumper 1">{{cite web|url=http://blogs.consumerreports.org/electronics/2010/07/apple-iphone4-iphone-4-bumper-case-fixes-antenna-issue-problem-signal-loss-tested-verified-consumer-reports-labs-quick-fix.html|title=Apple's Bumper case alleviates the iPhone 4 signal-loss problem|date=2010-07-13|publisher=[[Consumer Reports]]|accessdate=2010-07-13|archive-url=https://web.archive.org/web/20101204161703/http://blogs.consumerreports.org/electronics/2010/07/apple-iphone4-iphone-4-bumper-case-fixes-antenna-issue-problem-signal-loss-tested-verified-consumer-reports-labs-quick-fix.html|archive-date=2010-12-04|dead-url=yes}}</ref>。《[[CNN]]》覆述《消費者報告》的聲明指少量[[布膠帶]]已被證明能有效解決iPhone 4的掉線問題<ref name="CNN duct tape fix 1">{{cite news|url=http://www.cnn.com/2010/TECH/mobile/07/13/iphone.4.duct.tape/index.html?hpt=C1|title=iPhone duct tape fix|publisher=CNN|date=2010-07-13|accessdate=2010-07-13|archive-date=2010-07-17|archive-url=https://web.archive.org/web/20100717043712/http://www.cnn.com/2010/TECH/mobile/07/13/iphone.4.duct.tape/index.html?hpt=C1|dead-url=no}}</ref>。

蘋果公司解釋了用於計算要顯示的條子的公式是如何「出錯」。他們承諾糾正這個問題並在幾星期內發布一個軟件更新，以解決自原始[[iPhone 2G|iPhone]]以來一直存在的問題<ref name = "Statement by Apple on iPhone 4 reception issues">{{Cite press release|title=Statement by Apple on iPhone 4 reception issues|publisher=[[Apple Inc.]]|date=July 2, 2010|url=https://www.apple.com/pr/library/2010/07/02appleletter.html|accessdate=July 2, 2010|archive-url=https://web.archive.org/web/20100703161217/http://www.apple.com/pr/library/2010/07/02appleletter.html|archive-date=2010-07-03|dead-url=yes}}</ref>。《[[紐約時報]]》評論指「未能及早發現這個長期存在的問題實在令人驚訝<ref name="NYT signal bars 1">{{cite news|url=https://www.nytimes.com/2010/07/03/technology/03apple.html|title=Apple Acknowledges Flaw in iPhone Signal Meter|last=Helft|first=Miguel|date=2010-07-02|work=The New York Times|accessdate=2010-07-02|archive-date=2019-04-17|archive-url=https://web.archive.org/web/20190417162404/https://www.nytimes.com/2010/07/03/technology/03apple.html|dead-url=no}}</ref>。」

《消費者報告》指解決方案不是永久性的，然而作為第一步也是個好開始<ref name="CNN bumper fix 1">{{cite news|last=D. Sutter|first=John|url=http://www.cnn.com/2010/TECH/mobile/07/16/consumer.reports.iphone.case|title=Bumper and all, Consumer Reports still doesn't recommend iPhone 4|publisher=CNN|date=2010-07-17|accessdate=2010-07-17|archive-date=2020-05-07|archive-url=https://web.archive.org/web/20200507080615/http://www.cnn.com/2010/TECH/mobile/07/16/consumer.reports.iphone.case/|dead-url=no}}</ref>。但是，由於喬布斯並沒有指出解決問題的時間表，並且提供免費保護膠套只是暫時的解決方案，《[[PC World]]》決定把iPhone 4從「十大手機」的列表中移除，並將其重新分配給待定評級<ref name="PCW re-rated 1">{{cite web|first=Ginny|last=Mies|url=http://www.pcworld.com/article/201320/iphone_4_why_weve_reconsidered_its_rating.html|title=iPhone 4: Why We've Reconsidered Its Rating|publisher=PC World|date=2010-07-17|accessdate=2010-07-17|archive-date=2010-11-25|archive-url=https://web.archive.org/web/20101125215639/http://www.pcworld.com/article/201320/iphone_4_why_weve_reconsidered_its_rating.html|dead-url=no}}</ref>。

儘管媒體對具天線問題的iPhone 4持否定態度，根據ChangeWave Research於2010年8月的一項調查指，72％的iPhone 4用戶表示他們對iPhone 4「非常滿意」<ref name="PCW users satisfied 1">{{cite web|url=http://www.pcworld.com/article/202625/survey_most_iphone_4_users_very_satisfied.html?tk=hp_blg|title=Survey: Most iPhone 4 Users 'Very Satisfied'|publisher=PCWorld|date=2010-08-05|accessdate=2010-11-11|archive-date=2010-09-15|archive-url=https://web.archive.org/web/20100915102445/http://www.pcworld.com/article/202625/survey_most_iphone_4_users_very_satisfied.html?tk=hp_blg|dead-url=no}}</ref>。截至2013年9月，iPhone 4型號繼續保持不變。

2011年10月4日，苹果发布了新一代[[iPhone 4S]]，為iPhone 4的後續機型，其針對天線部分作出了改進，並表示已有效解決了收訊問題。