Unify the customer, not only the inbox
One person may fill in an ad form, ask a question on WhatsApp and later send a voice note on Telegram. Those records should belong to one customer context, not three isolated conversations.
OMNICHANNEL CUSTOMER CONVERSATIONS
Multiple channels are not the problem. Lost context, unclear ownership and starting over when a customer changes channels are what cause opportunities to disappear.
Multichannel inbox
One person may fill in an ad form, ask a question on WhatsApp and later send a voice note on Telegram. Those records should belong to one customer context, not three isolated conversations.
Decide who handles new enquiries, after-sales questions and high-value opportunities. Routing can use language, region, product or intent, but ownership must stay clear.
When sales takes over, they need to know what the customer asked, what was already shared, what matters now and what to do next. That is more useful than a long chat log alone.
If a customer does not reply on WhatsApp and later returns through LINE, the conversation should not restart with an unrelated opening message. Keep context while respecting the channel they choose.