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Revamped version of the iPhone 3G with faster processing speeds. Repair of this device is similar to the 3G, and requires simple screwdrivers and prying tools. Model A1303 / 8, 16 or 32 GB capacity / black or white plastic back.

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No Service when 3G is enabled.

Dear iFixit,

I am having a problem for a bit with my old 3GS: I get very poor connection when 3G is enabled. Basically, I have some network for a few minutes (10-15, it varies) then switches to "searching" and then "No Network". I usually don't get any network back.

It is interesting to note that when 3G is off, I have absolutely no problem getting a stable GPRS/EDGE connection.

I am currently running iOS v6.1, but I have this problem for ages.

Therefore my question is: Is there a different antenna for 3G and EDGE/GRPS? Would you recommend changing it?

Regards,

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Hello,first off all sorry for bad eng. but ill try to help you

So i saw a lot users od iphone have problem with iphone 3g/gs. No service on 3g network or when its off,i have that phone also and i have solution that worked 100%

problem is on signas switcher that is located on this picture you can see them: lower part of iphone.

http://i87.servimg.com/u/f87/13/27/39/62...

So here it is,take a hair dryer,a turn it on,heat this chips for about 10 sec,then whit your fingers push chips on logicboard,get iphone back on,go to settings-reset then reset network settings,and its workig :)

if its now working try to heat and push chips again

please share this solution becouse i cant see any other solution for this problem

and please correct my words if there is something wrong

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jurica, nice answer, but can you describe the location of the "signas switcher" a bit better?

tarafından

I do it by the way,but it does not work.

I must push chips on logicboard more powerfully?

tarafından

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Hi,

i had the same problem with an old 3GS. It was an error in the logic board, without a chance to fix it.

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can this problem be solved in same manner for android phones?

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