portable, carry (in hand), armed with, bring along
携 centers on having something with you and ready to use: carrying it by hand, bringing it along, or being equipped with it. The idea of portability follows naturally from something light enough to carry.
carrying (on one's person or in the hand)
cooperation; coordination; collaboration; alignment
cooperation; tie-up; joint business; partnership; alliance; sponsorship
to engage in; to participate in; to take part in; to be involved in
(Japanese) feature phone (as opposed to a smartphone); mobile phone designed for the Japanese market (with specialized features only available in Japan)
carrying (on one's person); taking with one
to carry in one's hand; to carry with one; to have on one's person; to bear
indispensable; essential; must-have
(Japanese) feature phone (as opposed to a smartphone); mobile phone designed for the Japanese market (with specialized features only available in Japan)
cellphone for kids
system integration
prepaid cellphone
not carrying (driver's license, passport, etc.); not having on one's person; nonpossession
comprehensive tie-up
community cooperation; regional cooperation; local cooperation
foreign cooperation; international cooperation
smartphone; smart phone
to be accompanied by one's family
must-have; indispensable item; necessities
strategic partnership
携 combines 扌 (hand) with 隽, which is a simplified form of 雋. 雋 likely contributes the sound and carries a meaning of something excellent or select, but the exact historical development of the modern simplified shape is uncertain.
The hand radical 扌 holds onto 隽, like a person carrying a prized object. Imagine a traveler with a hand always on their portable bag, ready to bring it along.
For ケイ, picture carrying a heavy case: case -> ケイ, and your hand 扌 is armed with it wherever you go.