No data connection with different discards and lost signal

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When using different SIM cards, can not connect to data and most of the times the cellular signal is lost, texting or calling takes time sometimes failed. Already have it repaired but only works for a couple of hours then back to main problem again. I am very disappointed. May I request for a replacement of unit? I already shouldered the transportation cost to have it repaired twice but to no avail. I already planning to bring this up to media because of the incompetence of your group.

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I already brought my unit to your service center but to no avail. I already spent some transportation money. May you replace the unit instead. I bought this on April 2018. I already planning to bring this issue up to media especially with Mr. Raffy Tulfo. Thank you.

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Please see screenshots. Data Signal is always on edge or none. Very hard to make calls, send text messages or receive call and text messages. I demand compensation for buying a product I could not use properly.

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My phone is Asus ZenFone Selfie Pro not ZE554KL

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My phone is Asus ZenFone 4 Selfie Pro.