Skip to main content

Will my phone work in USA?

What if you are travelling to a foreign country and you need to know if your phone will work there? The answer is simple. There are two things to check:
1. GSM frequencies for making telephone calls  (some phones use CDMA,these are not dealt with here)
2. Data service frequencies for accessing the Internet.

There are two GSM frequency groups:
1. 900 and 1800 Mega Hertz (MHz)
2. 850 and 1900MHz.

Most of the world is in the first category except USA. See the map.

The next question is: Now that I have found that USA uses 850 and 1900MHz for making telephone calls, can my phone use these frequencies?

As an example, take the LG Optimus L3 E400. What are the GSM frequencies of this phone? You can get these details from the http://www.gsmarena.com/ website. If you search for LG E400, you will get the following page.

For this phone, the key frequencies are:
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 900 / 2100

This data says that your phone can use both the 850/1900 and 900/1800 bands for GSM and 2G Internet (EDGE)

Therefore, LG E400 will work in the USA for phone calls and 2G Internet.


What about 3G and 4G?

The phone has 3G capability on 900 and 2100 MHz but no 4G capability. In the USA, 3G is offered on 850/1900 and 1700/2100 bands. As long at the service provider uses 2100MHz for 3G services, you will be able to get 3G services also.

Comments

  1. Nice. I never thought there was such a thing. Thanks now I know

    ReplyDelete

Post a Comment

Popular posts from this blog

How to Install RIOT Plugin for GIMP

How to Install RIOT Plugin for GIMP:: Since this article was first written a stand-alone version of RIOT has been made available Download the plugin from  http://luci.criosweb.ro/riot/download/Select the download link titled "RIOT as plug-in for other applications"   Launch the Riot-plugin.exe file by double clicking.The installer installs all the files including Riot.exe, Riot.dll, and FreeImage.dll in the location where you installed GIMP  If GIMP is open, close it and re-launch it.To optimise an image, open it then save with menu File->Save for web with RIOT  You can set the target file size by selecting "Compress to size" button  on bottom right corner of optimised image pane and providing the size in kilobytes. Alternatively you can use a slider provided to allow you to change the quality while showing you a preview of the resulting image.


Enjoy.

How to Install Packet Tracer 6.0.1 for Linux

This article is intended to help me remember the installation process for Cisco Packet Tracer 6 details of which seems to be hard to come by on the web.

1. Log in in to your Cisco Netspace account. Yes, you need to be logged in.
2. The "Download PT 6.0.1" link on is on the NetSpace home page.
3. Click this "Cisco Packet Tracer" link shown below the folder icon as shown in the figure below:

4. Select Cisco Packet Tracer 6.0.1
5. Select download location.
6. After completion of download, use your file manager to open that folder and rename the file to something such as "CPT6". It is a shell script so no file extension is required.
7. Change the file permissions to executable using command: sudo chmod 777 CPT6from a terminal window opened in the download directory. This assumes your downloaded file is renamed CPT6
8. Launch the file with command: ./CPT6 from the terminal window. You will get the message:

Self extracting archive...

Welcome to Packet Tracer 6.0…

Connecting USB 3G Modem to Safaricom in Linux Mint

This particular modem is a ZTE HSUPA MF637U modem. Click on images to see enlarged view. Let's get started:
OS is Linux Mint version 15. Yours may be older or newer.Plug in the modem to a free USB port and check that it recognises the modem as a drive in the File Manager whose icon is shown below third from left and the File Manager view is also shown with the modem listed as the "MODEM-SDSK" drive: Fig. 1. Linux Mint Desktop Panel

Fig 2. Linux Mint File Manager view showing listed drives at left and Application Manu at top. Click on image to see enlarged view.















3. Go to the Applications Menu shown in Fig. 2 and select Settings>Network Connections


Fig. 3. Network Connections dialogue. Click on image to see enlarged view.










4.  Select Add > Mobile Broadband then click  "Create"
5. Follow the wizard to select the device, country, billing plan, service provider and deafult settings.

Fig. 4. Safaricom default settings in Linux Mint. Click on image to see enlar…