Pakistan, Sept. 11 -- Apple's entry into the foldable smartphone market has triggered playful reactions from several rival brands. Samsung, Duolingo and Motorola joined the social media exchange after Apple unveiled its first foldable iPhone. Apple introduced the iPhone Duo on Wednesday and presented it as a major development in smartphone design. The launch quickly became a topic of discussion beyond the technology market.

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Samsung responded shortly after Apple announced the new device. The company has sold foldable smartphones since launching the Galaxy Fold in 2019. Samsung Mobile US referred to the "Duo" name while addressing language-learning platform Duolingo. "I'm so ...