My new chat 222, a polish phone but purchased in spain, works fine in spain with and orange sim card. but the t-mobile sim card from brooklyn has a hard time finding networks. if you turn the phone off and on again, it will find a network. but i just bought another t-mobile sim card in southern california, and it won't find any networks at all, no matter what, though once and awhile the orange sim card will find one.
SOURCE: Samsung t219 connectivity issue
i tried ALLLLLLLLLLLLl the codes for the samsung SGH T729 andddddddddddddddddddddddddd finally after fifty million codes entered....i am a genius JK.....
place the sim card you are using in the phone and enter this code "#7465625*638*39887090#" after a minute turn the phone ON ...btw i have at&t and unlocked a t-mobile phone all for free thanks to debbie :)
GUEST - you internal antenna might need to be service or replaced.
well you may not have it on the correct band so you should check that one.....or hard reset it *2767*3855#
SOURCE: have done hard reset on samsung j700 but still have network prblm
just go to network and select the band select 900 1800
SOURCE: network locked: and now phone freezed: samsung sgh-m150
please send circuit diagram of network of sgh-m150
SOURCE: How to unlock the SAMSUNG SGH-T401G (NT) Mobile
you can unlock it and switch over to another network , if you want to unlock, you can get codes here http://www.wickedunlock.com/samsung/rs11wp8/
you need to specify the country and network provider,
check, if your model is available in the list
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