Core Viewpoint - The iPhone 4 has seen a resurgence in popularity in 2025, with a significant increase in search interest and social media discussions, driven by nostalgic content shared by influencers and users [1][2]. Group 1: Market Trends - In 2025, searches for "buy iPhone 4" on Google increased by 979%, indicating a surge in demand for the device [1]. - On social media platforms like TikTok, there are over 340,000 posts related to iPhone 4, while discussions on Xiaohongshu have exceeded 54,000 with over 25 million views [1]. - Despite the increased interest, the second-hand market prices for iPhone 4 have not shown significant changes, with recent data indicating a price fluctuation from 40 yuan to 50 yuan due to rising demand [1]. Group 2: Product Features and Limitations - Experts highlight that the iPhone 4 can only be upgraded to iOS 7.1.2, which has not received security updates for over a decade, leaving it vulnerable to security risks [2]. - Users are advised to keep the device in airplane mode and avoid using cloud services to protect their data [2]. Group 3: Historical Context - The iPhone 4 is not the first older iPhone model to gain renewed interest; previous models like iPhone 5, 7, and 6s have also been celebrated for their unique photographic qualities [3]. - Since the launch of the first iPhone in 2007, Apple has released 22 generations and 51 models, with iPhone consistently ranking first in sales in China [3]. - In 2027, Apple plans to launch the iPhone 20 series to commemorate the 20th anniversary of the iPhone [3].

Group 1 - The product introduced is the Mensa Oil Painting Red Flower phone case, compatible with multiple iPhone models including iPhone 16, 15 Pro Max, 11, 12, 13, x/xr/xsmax, 6/7/8 plus, 14 pro, and 6s [2][3] - The material of the phone case is silicone, designed for full protection against drops, and is marketed as a trendy item [2][3] - The phone case is currently participating in a "Billion Subsidy" event on Tmall, with a subsidized price of 13.9 yuan for the iPhone 13 model in the color "Button Strap Small Lambskin Antique White - Oil Painting Color Flower + Short Wrist Strap" [2][3] - A coupon of 4.4 yuan can be applied, bringing the final price down to 9.5 yuan per unit, while the original price is 13.9 yuan [2][3]

Group 1 - The new feature is currently only available on iOS clients, requiring version 8.0.61 or above, while Android and HarmonyOS are still being adapted [1] - The feature allows users to send live photos from their albums, with the default setting for live photos being off [1] - Friends can view the full effect of the live photo by clicking the "live" button in the lower left corner after opening the large image preview [1]

Market Trends - The price of iPhones in Ethereum has generally decreased over the years, indicating a shift in the relative value of ETH compared to iPhones [1] - From iPhone 6s to iPhone 17, the price dropped significantly from 876.4 ETH to 0.18 ETH [1] Cryptocurrency & Technology Valuation - The price of iPhone 7 was 51.83 ETH, while the price of iPhone 8 dropped significantly to 2.65 ETH [1] - The price of iPhone X was 3.27 ETH, and the price of iPhone XS was 4.45 ETH [1] - The price of iPhone 13 was 0.25 ETH, the price of iPhone 14 was 0.51 ETH, the price of iPhone 15 was 0.50 ETH, the price of iPhone 16 was 0.34 ETH, and the price of iPhone 17 was 0.18 ETH [1]