Buyer beware - what is possible for 3rd party BlackBerry apps?

Recently, BlackBerry Cool wrote about a product called NetworkAcc, which claims to speed up your mobile network. A lot of BlackBerry sites have published their skepticism about the product, and rightly so.

NetworkAcc seems like a very cool concept that would certainly be of use to many. Unfortunately, none of what they claim to do is currently possible to the publicly exposed APIs.

The limitations of 3rd party access to API’s

Third party applications are fairly limited in what they can achieve in terms of network manipulation. For the most part, much of this is handled by the underlying framework, and most of it is handled at the OS layer. It is important to understand the overall architecture of the software on the device. At a high level, it looks something like this:

Operating System: Written in C++, this layer handles hardware interaction networking, process management and memory. Code written at this layer is compiled into machine code and run directly off the processor.

Virtual Machine: Also written in C++, the virtual machine is what runs all of the Java software on the phone. It sits just above the OS, and handles all Java related tasks, like interpreting byte code, managing program memory and all the other fun tasks that programmers would much rather ignore.

Java Apps: This layer is what people mistakenly call the OS. In reality, it is what makes up the front end interface to much of the native (C++) level software. Internally at RIM, programmers have much flexibility through the Java Apps APIs to plug into various native system functions, such as the GPRS packet framework.

In the public space, which is what 3rd party developers have access to, the Java Apps APIs are very limited in terms of how much you can manipulate the core system functionality. You cannot, for example, plug into the underlying network system and globally affect how the data is buffered and the speed at which it is sent.

The following is an example of what 3rd party apps can affect on the device in terms of network:

// Initiate a connection to blackberrycool
HttpConnection c = (HttpConnection) “;deviceside=false” );

This little snippet describes the interface that 3rd party developers have to create connections. The API is the only interface to the native level, and all of the actual network code was written into the OS. The parameter on the end, deviceside=false, indicates the connection type (in this case, route traffic through a corporate BES). There are a few other parameters you can manipulate, and they do not affect speed or throughput. After this call, the programmer has no control over how the connection is set up, how the packets are formed, what header data is placed into the packets at the tcp/ip layer etc.

Using hidden APIs to offer more features

There are a few hidden APIs that are exposed publicly, but not documented. Fortunately, it is easy to find out what those are. A developer only needs to extract the .class files from net_rim_api.jar, the library that describes the BlackBerry framework, and run javap on them.

javap is an application that will look into the .class files for the method symbols and pull them out for all to see. In other words, it will un-hide the hidden APIs. In addition to the hidden APIs, there are also magical strings, like the App World application property strings, that can be used to do all sorts of fun stuff. But the point of explaining all this is not to show what you can do, but what you can’t. Even in the hidden APIs, there is no way to manipulate how the device connects to the network.

Side note: traffic counters

There is another app (or 2) out there that purports to be able to count how much traffic in kilobytes is flowing through the device. Third party applications only have the capability to ask for the total number of packets sent and received by the device, via this call:

RadioInfo.getNumberOfPacketsReceived() and RadioInfo.getNumberOfPacketsSent()

The data you get out of those two methods is misleading. It is important to note that a packet can be of variable size. In fact, packet size can vary by hundreds of bytes. The MTU (maximum transmission unit) of a packet on the device is somewhere in the range of 600-1200 bytes.

Packets can be chunked up into smaller pieces when required, much smaller in fact. You can have packets that are only 8 bytes long! This means that the number of packets really has no direct correlation to the total amount of data. In fact, these applications are probably off by a significant order of magnitude. Still, the capability to see the number of packets going across the network is good information to have, and can give users a rough estimate when shown on a graph what their data usage looks like over time. Unfortunately these apps are not fairly presenting the data.

Access to RIM internal APIs

No 3rd party organization has or ever will have access to RIMs internal APIs. The only way to gain access to internal APIs is to be aquired by RIM and work at RIM. You will notice that applications like MSN messenger, Yahoo messenger, Google Quicksearch, Facebook, and all other applications that look like they have access to some special device functionality were in fact written by RIM.

What 3rd party apps CAN do

Third party applications can affect a number of network settings for themselves, but not others. Note that again, these settings do not include speed and throughput. Tird party apps can specify whether to connect via BES, BIS-B, WiFi, Direct TCP, WAP2, WAP. They can also specify WAP and tcp gateway parameters like apn, username and password. There are a few other parameters that effect security and network timeout but again, those aren’t relevant.

Hacking the native layer

This is very very difficult. Actually, gaining access to the native layer via a Java level 3rd party application is completely impossible.

The buyer must be beware of what applications such as NetworkAcc claim to offer. By knowing what levels of access 3rd party developers have to the device, you can be a better judge of what claims are valid.

14 Responses to “Buyer beware - what is possible for 3rd party BlackBerry apps?”

  1. 1 Paul

    Fabian FTW!

  2. 2 Jeni

    Thanks for the info!
    And for example apps like BateryBooster are a fraud too?

  3. 3 Fabian

    What do you mean by that ;-)?

  4. 4 Fabian

    Nice article! So true!

  5. 5 BlackBerryCool (BlackBerry Cool)

    Buyer beware - what is possible for 3rd party BlackBerry apps?

  6. 6 Kyle

    If you know of any other applications which make impossible or dubious claims, comment them and we’ll investigate!

  7. 7 Fabian

    äääähm… battery booster?!?!

  8. 8 Willie

    I have used battery booster with no problems. What are your thoughts?

  9. 9 Jeni

    Well, I really do not know if it works. I have it and I’m not notice a real difference in terms of battery life. So, I want to know if in fact works.

  10. 10 Willie

    Well I noticed a difference and ran it both ways with the app installed and had at least another hour of stand-by life. So its up to you. Its not hurting anything

  11. 11 Kent

    Really? Don’t you think it would have been nice to post this analysis before the original article? Could you be bigger amatures? How about a refund for the $9 app? That would be nice.

  12. 12 Mike

    I used BatteryBooster (on my Bold) for 3 weeks and I truly believe it is a scam. It did nothing. After contacting the developer he said that it doesn’t always work and gave me a refund.

  13. 13 Daniel from eMobiStudio

    Dear sirs,

    Thanks a lot for your interests and comments in my company’s newly released product - NetworkAcc. This is Daniel, responsible as technical manager for eMobiStudio Inc.

    Since founded in 2005, my company has been dedicated in designing and developing personal productivity software for smartphones. In the past few years, our product MemoryUp Pro ( has won ‘Top Seller’ award from Sony Ericsson’ P1-Choice Program, 5-star ranking from DownloadPipe and Softpedia. It has also been called ‘The Latest and Greatest Application’ and ‘A Must-have for Smartphone’ by Handango.

    Now NetworkAcc ( is my company’s second hit as part of our continuous efforts to boost up smartphone users’ mobile experience. As always, the algorithm used in NetworkAcc is not a disruptive or highly innovative technology, but a know-how developed by our tech team through past years of hard work. Our testing results have proved its effectiveness for Java enabled systems. What NetworkAcc exactly does is to fine-tune some key parameters based on smartphone users’ different network setting including their BB OS, server type, and connection type etc. By working in the background, NetworkAcc can continuously improve data throughput and reclaim redundant network activity related system resources.

    Hope that helps. Sorry I can not provide more details on our algorithms as they are part of our company’s confidential information. But please feel free to contact me if you have any further questions or advices. We are always ready to work with you.




    eMobiStudio Tech Team

    -Boost Up Your Mobile Experience-

  1. 1 NetworkAcc (with MemoryUp Pro) Review - They Rock! - Page 2 - BlackBerry Forums at

Leave a Reply