help with us sda t-mobile on italian network

[Guest M4cch3]

hi all, i recently bought a sim unlocked us sda t-mobile phone, i put in my sim card (vodafone, but i also tried wind and tim) and it seems that he can't take the network, it's very unstable(most of time it's on searching network, sometime have 1/2 signal line power out of 5) and my all other phone have no this problem with the same sim.

so this is the question: there is same setting i need to change, is normal because is t-mobile phone, or it is broken?

Thx

[Guest martin]

Hi M4cch3

Is it a GSM Tri band phone ?

GSM Quad band= GSM 850/900/1800/1900

GSM Tri band Europe= GSM 900/1800/1900

GSM Tri band USA= GSM 850/1800/1900

http://www.gsmworld.com/roaming/gsminfo/roa_grst.shtml

Vodafone, TIM and Wind all transmit GSM 900 and GSM 1800 in their networks.

If you have bought a Tri band USA phone then you will not have access to the GSM 900 signal so you could get poor coverage ;)

[Guest M4cch3]

before i buy the phone i make some research:D and the us version of sda is the same of the htc tornado/imate sp5/qtek 8310, so it's a quadband phone.but thx for the reply

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