Q. Which of the following mobile generations first introduced video calling?

निम्नलिखित में से किस मोबाइल पीढ़ी ने सबसे पहले वीडियो कॉलिंग की शुरुआत की?

A
1G
B
2G
C
3G
D
4G

Explanation

Explanation will be available soon. Please stay tuned.

व्याख्या जल्द ही उपलब्ध होगी। कृपया बने रहें।

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