Sedp23 Active member May 6, 2015 1,375 0 36 Jan 24, 2017 #1 I have a friend on a 640 XL she unlocked from att, she put her tmobile sim in and it works fine but when she's on a call she can't use her data Is there some kind setting she needs to change in sim settings so she can use data while on calls?
I have a friend on a 640 XL she unlocked from att, she put her tmobile sim in and it works fine but when she's on a call she can't use her data Is there some kind setting she needs to change in sim settings so she can use data while on calls?
libra89 Active member Feb 6, 2015 11,076 7 38 Jan 24, 2017 #2 Check the APN and make a new one to match the ones that T-Mobile uses.
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