Domicilio translates to "residence" or "home address." While it might seem like a common word, its use here is particularly poignant and less common in song lyrics than more casual terms for "home."
In the song, the narrator is desperately trying to find his ex-lover, only to discover, "cambiaste de domicilio" (you changed your address). This word choice emphasizes the finality and distance of the breakup, highlighting the narrator's despair as he realizes his ex has completely moved on, even changing where she lives to avoid him.
Ever felt a heartbreak so deep that time just doesn't seem to heal it? In "Celular," Remmy Valenzuela and Gabito Ballesteros sing about this exact feeling. The song tells the story of someone trying to move on from a breakup that happened months ago, but finding it impossible. He expected time and his own pride to help him forget, but the feelings are still as strong as ever.
The singer turns to alcohol to numb the pain, spending his time in bars with "bitter drinks" (tragos más amargos). But he discovers that even when he's drunk, he can't get his ex out of his head. His life feels as "empty as the bottles" (vacía al igual que la botella). To make matters worse, she has completely cut him off. He tries to call, but she changed her cell phone number. He even goes to her house, only to find she has moved. The song is a powerful expression of feeling lost and heartbroken, unable to escape the memory of a past love.