Author Archives: CellPhone

Sony Ericsson Z550i Mobile Phone Review

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May of 2006 saw the addition of the Sony Ericsson Z550i to the line of Sony phones. This new flip phone was modeled after the popular T610 with its glossy brushed metal exterior. The phone measures 87.5 mm by 45.4 mm by 20 mm and weight 93 grams. The tri-band GSM/GPRS mobile phone supports the GSM 900, GSM 1800 and GSM 1900 MHz bands.

The Sony Ericsson Z550i has a 1.3 MP digital camera that captures still photos and video clips with equal ease. The bright colour display has 262K with a 176 by 220 pixel resolution and measures 30 mm by 37 mm. There is a second external monochromatic display of 128 by 36 pixels. The MP3 or AAC supported music player is another bright spot on this camera. Both the digital camera and the music play access a full 20 MB of built in storage space. There is the capacity to introduce a Memory Stick Micro (M2) card to 1 gig in size of added storage is needed.

The Sony Ericsson Z550i also contains a built in FM radio receiver. Attractive wallpaper, screen savers and themes can be easily downloaded to the phone.

Messaging capacity in the Sony Ericsson Z550i is amazingly comprehensive. Not only can the user access MMS and SMS messaging, but also push based email, POP and IMAP. Bluetooth connectivity is another added feature which makes this mobile phone even more popular with users. GPRS Class 10 provides speeds of 32 to 48 kbps.

Preloaded 3D games for recreational activities and inclusion of Java MIDP v2.0 specification. Sound output is controlled by the polyphonic 40-voice music generator. The phone also supports MP3 and AAC. Customization and vibration features are readily available. You can even compose your own ringtones. Both the Sony Ericsson Music DJ and the Sony Ericsson Video DJ are built into the phone.

For over the road travel, the Sony Ericsson 440i has a built in handsfree speaker phone.
An enormous 1000 entry phonebook with included Photocall is part of the features. You can track up to 30 received, missed, and dialed calls.

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BlackBerry Programming 101 – How to Get Started With BlackBerry Software Development

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The success of newer BlackBerry models like the Pearl, Curve, Bold and Storm have allowed RIM (Research in Motion) to penetrate the consumer smartphone market and go head-to-head with the Apple iPhone as an application platform. If you’ve been ignoring the BlackBerry platform because it was too Enterprise-focused for your applications, it might be time to specifically target the BlackBerry. Here’s how you get started.

It’s Java Time

BlackBerry development for all recent models is done exclusively in Java. So if you’re not a strong Java programmer, now’s the time to brush up on your Java programming skills. (C# programmers will find the transition to Java fairly simple, the languages are very close in most respects.) Don’t learn about the newest Java features, however, because the BlackBerry platform is built on top of Java Micro Edition (Java ME), which is itself a derivative of Java version 1.3. So forget all the fancy (but useful) language features introduced in Java 1.5 — generics, enumerations, and so on — you can’t use these in BlackBerry programming. You can’t also use most of the library classes you’re familiar with — they’re just not there. A small subset of the Java Standard Edition (Java SE) classes are supported, as well as a number of BlackBerry-specific classes.

Java Micro Edition?

Once you’ve brushed up on your Java, you need to spend a bit of time understanding the Java ME platform, which was formerly known as Java 2 Micro Edition, or J2ME for short. You need to understand the concepts of configurations and profiles, and in particular the CLDC and MIDP standards. You’ll find lots of information about these in various books and on Sun’s Java development site.

The BlackBerry Platform

After learning about Java ME, it’s time to explore the BlackBerry platform. The BlackBerry platform is based on the CLDC and includes support for MIDP 2.0. However, a large number of BlackBerry-specific classes are also provided. Which brings you to the first question you’ll face: are you going to write a BlackBerry application or a MIDP application? In a MIDP application you’re constrained to only use the APIs exposed by the CLDC and MIDP standards. Your application will run on the BlackBerry and on most cellphones, but it won’t be able to use any of the BlackBerry’s special features. You can use any MIDP-compatible development tool, such as the Sun Java Wireless Toolkit for CLDC (formerly known as the J2ME Wireless Toolkit), to create your applications.

Most application developers opt to build BlackBerry-specific applications. This means learning the BlackBerry-specific APIs — including new user interface classes — and using the BlackBerry Java Development Environment (JDE) to develop your applications. The JDE, which is free to download, works with the standard Java Software Development Kit and provides you with all the tools necessary to create, package, test and debug BlackBerry applications. You don’t even need a BlackBerry handheld, because the JDE includes a full-featured BlackBerry device simulator. A complete set of JavaDocs is provided that describes all the classes and interfaces available to programmers.

After downloading and installing the JDE, you’ll want to read the developer’s guides that come with the JDE and look at the sample applications that are shipped with it. Then start your development by writing a few simple applications to get a feel for the BlackBerry APIs and the tools.

Get A BlackBerry Handheld

Although you can develop and test your applications for free, at some point you’ll need to run the application on an actual BlackBerry handheld. This will cost you money, of course, and so it’s not something you’ll want to do until you’re serious about writing BlackBerry applications. On-device testing is crucial to ensuring that the application works correctly, because the simulator is not a perfect emulation system.

If you’re truly serious about BlackBerry application development, consider also joining one of the BlackBerry developer programs for additional support and early access to new devices and APIs. You should also explore RIM’s other BlackBerry developer resources. There are also third-party forums and books available to help you learn the BlackBerry platform.

Conclusion

BlackBerry programming is not hard if you know some Java and you understand the constraints and limitations of the underlying Java ME platform. You have to learn a new set of APIs and use new development tools, but in the end it’s just another kind of Java programming.

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Nokia E90 and Nokia N95 – Two Popular Mobile Phones

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Nokia is regarded as a mobile phone giant, globally. Despite the presence of so many mobile phone companies, Nokia is still number one. This is because of the wonderful cutting edge technology adapted by Nokia s well as its sharp and clever marketing strategy. Taking its legacy forward, Nokia is making its mobile phones more feature-rich than ever. It has turned phones into a source of entertainment with the all new Nokia E90 and the Nokia N95, which are very popular.

The, Nokia E90 is a communicator and a 3G smart phone. It features dual screens along with dual keypads. The phone’s internal screen is able to display around 16 million colors at a stunning resolution of 800 x 352 pixels. The external screen on the other hand uses a resolution of 240 x 320 pixels, to display the 16 million colors.

The Nokia E90 mobile phone has an integrated 3.2 mega pixel camera. It also has an auto focus facility as well as a built in flash. The phone’s camera is known to capture some really sharp images and videos.

Also the Nokia E90 has an excellent music player along with a FM radio. Also it has a Quad Band support, an XHTML Web Browser, a WLAN. For connectivity it has, a USB 2.0, a mini USB along with the Bluetooth and infrared connectivity options.

The Nokia E90 also has a GPS maps application. It has a built in memory of 128MB that can be extended with the help of a Micro SD memory card.

On the other hand the Nokia N95 was released before Nokia E90. This phone is highly advanced and features a slider mechanism that can open the phone in two ways. The biggest USP of the phone is the 5 mega pixel camera with auto focus. The camera also has a flash as well as a 20 x digital zoom.

The camera in Nokia N95 has a wonderful Carl Zeiss Optics Tessar lens. The integrated music player is highly powerful and is able to support various sound formats like, AAC, MP3 and WMA. The phone also has some connectivity options like, a USB 2.0 , a 3G, a Bluetooth, Edge technology, Pop Port, HSCSD as well as Wi-Fi.

Both the phones have some really good features that make both Nokia E90 and Nokia N95 suitable for mobile phone users.

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