Yes, LG has already released the Android Pie 9.0 Update for the LG Stylo 4.
AT&T pushed the Android Pie Update for the AT&T LG Stylo 4 Plus LMQ710WA (aka LM-Q710WA).
At the same time, The Unlocked LG Stylo 4 and Amazon Edition LG Stylo 4 also received the Android 9.0 Pie Update in the U.S.
The Sprint LG Stylo 4 has model Name Q710AL, It should receive the Android Pie Update too.
The Stylo 4 from AT&T and Sprint supports Software Update via OTA (Firmware Over-the-Air) Only.
LG Stylo 4 Variants & Versions, All LG Stylo 4 variants listed below should receive the Android 9.0 Pie Update in the not long future.
- Q710CS – Cricket Wireless
- Q710WA – AT&T [released]
- Q710TS – T-mobile
- Q710MS- MetroPCS
- Q710AL – Sprint, Boost Mobile, Virgin Mobile
- Q710US – Xfinity Mobile
- Q710PL – Boost
- Q710ULM – U.S. Cellular
- Q710ULS – Spectrum
- Q710ULM – ACG
- Q710ULM – Unlocked [released]
- Q710ULM – Amazon [released]
Anyway, The carriers are the decision-maker. LG official has already developed the Android 9.0 Pie software for the LG Stylo.
The carriers in the U.S. will decide if they are going to release the Pie Update for the LG Stylo 4.