Wikipedia (mobile) - click to view Wikipedia on a mobile device
If a browser is installed for general use, it can be used to access the general Wikipedia site, also for editing, depending on limitations of the browser. One may want to adapt the user style and preferences to optimize them for the mobile device. For example, navigation popups may or may not be convenient on the mobile device.
Official online version
The official mobile version of the English Wikipedia. Users of supported mobile devices will be automatically redirected to this Mobile webinterface of Wikipedia.
- Supported are: iPhone, iPod Touch, Android, Palm webOS, Opera Mini, NetFront (SonyEricsson phones, Playstation Portable, Playstation 3), Nintendo Wii, and numerous others.
The mobile version is available for all versions of Wikipedia. It is actively developed, supported and translated. Editing is not yet possible and you might want to use a third party solution as an alternative. If you don't like using the mobile interface, you can navigate to the actual Wikipedia or choose to disable the mobile interface permanently on your device. You can find these options at the bottom of any page. If you have permanently disabled the automatic redirect to the mobile interface and have since changed your mind, you can use the activation page, to restore the automatic redirect behavior. (Note: some users have reported that the activation page does not work for them). 
- Wikipedia mobile website
- E-mail, Twitter, Mobile-l mailing list
- Report a new bug and List of known bugs
Some of the key features that are still missing in the mobile gateway experience include:
- Image Uploads
During Q2 2011 the WMF halted all new development work and undertook a project to port the existing Ruby gateway to a MediaWiki extension to simplify the operations infrastructure. This project replaced the existing Ruby gateway for all functionality and full deployment was completed on 12 September 2011.
Many older phones have poor browsers. If yours is Java ME-capable, you might consider installing Opera Mini, a Java ME-based Internet browser for mobile phones. Opera Mini has a built-in Wikipedia search facility.
Official iPhone application
The official iPhone application from the Wikimedia Foundation is Wikipedia Mobile. It is free and provides a read-only version of Wikipedia, that is very similar to the mobile web version of Wikipedia. It also allows you to find geotagged articles near your current location.
Amazon Kindle (3G versions) have the free access to Wikipedia content through mobile phone network on the "experimental browser" included in Kindle software. All content is shown in black-and-white (all colored images and graphs are converted).
Mobile access through third-party websites
Many users and developers have created their websites for reading Wikipedia on a variety of mobile devices.
One of the most prominent Wikipedia portals for mobile devices is Wapedia. Having started in August 2004, Wapedia offers the recent version of every article. Next to Wikipedia, it can provide access to the sister projects Wiktionary, Wikiquote and many other popular wikis. Wapedia pages currently contain advertisements inserted by the site's owners. It supports a wide range of devices and even some of the oldest mobile devices can be used to access Wikipedia through this website.
Sevenval AG offers a free real-time transformation of the current Wikipedia. The link to the service is http://wikipedia.7val.com. It offers a full-blown version of Wikipedia for all kinds of mobile devices. This enables mobile users to edit articles and administer their personal accounts. Wikipedia's sister projects – Wiktionary, etc. – can be accessed via this service as well. 50 languages of Wikipedia are supported. 
The following features are currently available.
- Device recognition of mobiles, smartphones, PDAs, etc., which enables the individualized adaptation of the presentation transmitted to different types of devices.
- Complete administration of articles including editing, history, discussions, etc.
- Complete administration of user accounts and automatic login if cookies are allowed.
- Automatic language recognition at wikipedia.7val.com.
- Direct access to 50 language by using a URL prefix, for example http://en.wikipedia.7val.com for English and http://fi.wikipedia.7val.com for Finnish. A list of languages can found here.
A free real-time mobile-adapted Wikipedia browser provided by HAWHAW at http://mobile.wikipedia.org minimizes images and presents article text in pieces of approximately 7kb to facilitate transfer. In standard browser, often hundreds of kb are transfered when opening an article. HAWHAW is suitable for slow or expensive Internet access, as well as devices with a small screen, but may well be used in all conditions to get a quick introduction to various concepts, which is usually provided in the first 7kb, making downloading of further pieces mostly unnecessary.
HAWHAW stands for HTML and WML hybrid adapted Webserver
It does not give spelling suggestions for slightly misspelled terms, and does not support tables.
A computer-generated audio (speech synthesis) version of all Wikipedia articles is provided by the Pediaphon service. It is usable on- and off-line with common MP3 players, PDAs, cell phones (WAP) and with every phone via voice call. Pediaphon can be used as a location-based service.
Automatic conversion from HTML to WML is not really a «version» of wikipedia, but is still worth mentionning. Some projects offer transcoding software (e.g. Coldjava's h2W servlet), while others offer the transcoding online and on the fly (e.g. BabelServer).
Many iPhone applications exist for browsing Wikipedia. All the applications so far are read-only versions of Wikipedia. Currently, the only way to edit Wikipedia on an iPhone is to access it via Safari. The links will open the iTunes Store:
|Wikipedia Mobile||Free||No||Official Wikipedia iPhone application|
|WikiGear Free||Free||No||Different interface, specially designed for multilingual users. Offline version in development.|
|Wikipedia Offline||$8.99||No||Specially designed for offline access and late night viewing|
|All Of Wikipedia – Offline||$9.99||No||Specially designed for offline access|
|Respotter Wiki||Free||No||Shows geotagged articles in Google Maps|
|WikiRadar||Free||No||Searches for geotagged articles near your current location|
|WikiAround||Free||No||Searches for geotagged articles near your current location|
|Wikihood||Free||No||Searches for geotagged articles near your current location|
|Wikihood Plus||$4.99||No||Searches for geotagged articles near your current location|
|WikiMe||$0.99||No||Searches for geotagged articles near your current location|
|NearestWiki||$1.99||No||Searches for geotagged articles near your current location|
|WikiTrend||$0.99||No||Shows most accessed articles from the past few hours|
|Wiki Hunt||$1.99||No||Game where goal is to get from one random article to another in the least amount of clicks|
|WikiQuiz Lite||Free||No||Game where you must read articles with the titles omitted and guess the article titles|
|WikiQuiz||$0.99||No||Game where you must read articles with the titles omitted and guess the article titles|
|Wikipedia Random Article of the Day||$0.99||No||Provides a random article|
|WikiFlow||Free||No||"Random Wikipedia articles flow in and out of the screen"|
|Wiki Tap||Free||No||Search several sites including YouTube, Wikipedia and dictionaries|
|WikiSnail||$0.99||No||"WikiBrowser" designed for MediaWiki wikis (including Wikipedia)|
|Minipedia - Offline Encyclopedia||Free||No||Contains the 100.000 most read articles. Multilanguage support: English, Chinese, French, German, Italian, Japanese, Korean, Russian, Spanish|
- See all 3P apps in Android market
Windows Mobile applications
A read only version of Wikipedia is available at http://wikipedia.boopsie.com/. This mobile phone download supports BlackBerry, Windows Mobile, Palm OS, Symbian S60, J2ME, Android, and iPhone. (A BREW version is available but must be side-loaded.)
WikiPock is a mobile application that provides offline access to all Wikipedia articles in 22 languages for Windows Mobile, BlackBerry, Android and Symbian OS mobile phones. All the articles are stored in the mobile phone's memory.
Evopedia is a application that provides offline access to all Wikipedia articles in differents languages for Maemo, SHR, Windows, Ubuntu.