Why is my wifi working sowly since replacing LCD and glass?

i replaced the glass and LCD digitiser on my samsung grand prime. The wifi has been very sporadic since putting it back together...any ideas on how to fix it? Please

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Check the antenna connection. The teardown or replacement guides for this device should show you where.

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Would you be able to tell me where that is please?

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It should be an long or short antenna cable going from the charger port to the logic board. Well this is the case for most samsung boards. Sometimes they are either not plugged in or missing (meaning you forgot to put it back in).

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