iPhone Does not detect Vodaphone signal in India?

magenta6807747

    When I landed in India, my Android phone immediately detected the local carrier signal (Vodaphone or Cellular One). But my wife's iPhone (also on the same T-Mobile account) never detected the local Carrier overhead signal in India. How can I make sure iPhone and Android mobiles will both detect overhead signal from Vodaphone etc when we are in India.?

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