Editor’s note: This is a Guest post by Tony Maro, who is Chief Information Officer at EvriChart, Inc. He writes a blog at www.ossramblings.com and you can follow him on Twitter at www.twitter.com/TONYMARO

In order to prevent you from using your mobile phone on other networks, some carriers lock your mobile phone to a certain sim-card or network. In that case you can not use your BlackBerry smartphone with another sim-card or on a different network.

If you are synchronizing your BlackBerry with different personal information manager (i.e. Outlook and Lotus Notes) or if you are synchronizing your data with Google Sync it can –admittedly rarely – happen that you screw up your contacts database on your BlackBerry. You might end up with duplicates, deleted address field, sorting of contacts messed up.

Traveling abroad with your BlackBerry smartphone is quite convenient because you can still receive all your emails wherever you are in the world. On the other hand you might be confronted with significant costs associated with data use and roaming costs. If you are used to a data flat rate in your home country you can quickly end up with several hundred dollars additional costs on your phone bill.

If you have been wondering what the different colors of the LED on your BlackBerry mean, here is a short guide that explains them and also instructions how to turn them on or off.

While there are a lot of solutions to customize the Skin they all have one problem: they are not really unique.

Do you want to listen to music on your mobile phone but you don’t want to spend the time to go music to mobile phone then flight times the might be exactly what you have been looking for.

If you own a BlackBerry Curve you might have the same problem that I and quite a few other Curve owner have – dust under the screen of the BlackBerry. While you might try to get a new BlackBerry from your carrier, chances are probably not that high. But don’t worry, you can remove the dust from your screen by yourself!

Every once in a while out beloved BlackBerry’s face the problem that they the software hangs. Most people think that the only way to reboot your BlackBerry is by taking out the battery. Luckily the developers of the BlackBerry OS thought about this problem and they have implemented a feature that allows to reset the BlackBerry just like you can restart a windows computer with Ctrl-Alt-Delete.