Iphone 6 LTE India

Hi,

I'm based out of India. It's regarding Iphone 6 LTE compatibility in India.

There are different models (like Model A1549 (GSM & CDMA), Model A1522 (GSM & CDMA) with LTE (Bands 1, 2, 3, 4, 5, 7, 8, 13, 17, 18, 19, 20, 25, 26, 28, 29) and Model A1586 (GSM & CDMA), Model A1524 (GSM & CDMA) with FDD-LTE (Bands 1, 2, 3, 4, 5, 7, 8, 13, 17, 18, 19, 20, 25, 26, 28, 29), TD-LTE (Bands 38, 39, 40, 41) in India.

Like the same way there are different models available in worldwide.

So I have few queries as below :

1. How can I know whether it supports some specific band before buying Iphone as there are different models available in the market?

2. If I travel to other countries, whether it supports those LTE bands also or not ?

3. Whether Iphone supports only the existing LTE bands only in India or upcoming LTE bands also ? If not, what to do from my side to use those upcoming LTE bands ?

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Regards,

Ajay