Inquiry about 4G LTE Retro Desktop Telephone NEW

We are sourcing a ready-made 4G LTE retro desktop telephone for a New Zealand customer targeting the home and youth market. The product should be a fixed wireless phone (FWT) with SIM card slot, unlocked, supporting LTE Band 3 (1800MHz), Band 7 (2600MHz), and Band 28 (700MHz). VoLTE voice call support is required, with preference for proven IMS registration and test experience in NZ, Australia, or similar markets. Key features: physical keypad dialing, speed dial, built-in backup battery for power outage, and basic functions like caller ID, phonebook, and hands-free. The design must be home-style, colorful, retro (90s look), not office or senior phone. Please provide compliance documents (IEC 62368-1, EMC, SAR, CE/FCC/RoHS if available) and confirm customization options: logo silk-screen, boot logo, color box, manual, and multiple color choices. We need: - Product catalog, pictures, specs - FOB sample price - Unit price for 100, 500, 1000 units - MOQ for white label - Production lead time for 200/500 units - Info on experience supplying international brands, carriers, or overseas customers If you have a suitable mature model, we can arrange sample purchase for local network testing after technical confirmation.