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Question
I have AT%26T but I want to unlock a T-Mobile Phone and use my AT%26T service on it. However, I have had a friend do this also but some applications on his T-Mobile Phone were not available/did not work when he had it unlocked "example": The web browser and Internet applications. Is this something I may have a problem with?
You will definitely not be able to use MMS or Web Browsing when you put your AT&T SIM card into an unlocked T-Mobile phone. This situation happens 100% of the time. The reason is that when you use a phone that was not intended for your specific carrier, these settings are not in the phone because they are unique to each carrier. In order to use MMS and WAP, you have to program these settings into the phone. Additionally, any applications that are on the phone will not work because they are specific to T-Mobile. I personally wouldn't advise using an unlocked T-Mobile phone over an AT&T phone because the AT&T phones have been tested and set up for AT&T's network and the same for T-Mobile. If you really want to use a T-Mobile unlocked phone, then be prepared to have to code the settings for MMS and WAP for AT&T into the phone. It will depend upon the phone as to where and how you set these up, but the actual settings are the same for all AT&T phones:
The APN is wap.cingular
066.209.011.061 is the proxy and 9201 is the port number
There is no user name or password required
For MMS
http://mmsc.cingular.com
Same IP address and port number as above
No user name and password
I hope this helps. Thanks. DebiN
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DebiN
Expertise
I can answer questions on cellular phones, the physical device, the network, contracts, billing, ordering, porting and what to look for when purchasing cell phones. I am located in the United States. I am an expert on BlackBerrys, Treos, HTC devices and iPhones as well as cellphones and aircards. I have over 15 years of experience in both the wireless and wireline world with the carriers. I have a lot of knowledge regarding the wireless providers - their services, prices and policies, both GSM AT&T and T-Mobile) and CDMA (Verizon, Sprint/Nextel). I am very familiar with the individual devices and their specifications. I can also answer questions regarding BlackBerrys, iPhones and other PDAs, both Palm-based and Windows-based. I can troubleshoot most any problem someone is having with their cellular device or with the provider.
Experience
Over 20 years in the Telecom industry working for the carriers with individuals, small business, medium business and large corporations(Fortune 500). Also worked as a professor in Maryland for 10 years teaching telecommunications.
Organizations
I belong to several organizations
Education/Credentials
Master's in Telecommunications
Awards and Honors
Received several awards for papers that I have published over the years
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