Do you mean one of these when you say “Y12 customer service”?
– A smartphone model (e.g., Huawei Y12, Vivo Y12) and its manufacturer support (warranty, repair, contact numbers, service centers).
– The Y-12 National Security Complex (Oak Ridge, TN) — public affairs or contractor customer/service contacts.
– Something else (please specify company/product).
Tell me which one and any region (country) you want phone numbers or service-center addresses for, and I’ll produce the requested detailed HTML text.