[Leica] OT: Sim Chip in Europe

[Nathan Wajsman]

It must be something strange that T-Mobile does to the phones it sells. When I am in the US, I have no problem using my iPhone there (voice, data), and conversely, my family from Florida were just here last week, and their US phones worked here without any problem. Their carrier back in the States is AT&T.

Cheers,
Nathan

Nathan Wajsman

Alicante, Spain
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> On 7 Aug 2018, at 22:06, Brian Reid <reid at mejac.palo-alto.ca.us> wrote:
> 
> On 2018-08-07 12:36, Spencer Cheng wrote:
>> I have vague
>> memories that T-Mobile uses a slightly different set of frequency
>> bands compared to other North American carriers.
> 
> They vary widely. See
>    https://cellphonesignalbooster.us/blog/lte-frequencies-and-bands-of-cell-phone-carriers-in-usa-canada/
> 
> T-Mobile uses 1900 MHz Band 2 LTE, 700 MHz Band 12 LTE, 1700/2100 MHz Band 4 LTE.
> 
> And see https://www.frequencycheck.com/countries/germany for example. Germany uses Band 3 (1800+), Band 7 (2600) and Band 20 (800 DD). I see no overlap with T-Mobile US frequencies, but sometimes phones have hardware for bands not used by the carrier.
> 
> If you want technical details and explanations see https://en.wikipedia.org/wiki/GSM_frequency_bands
> 
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