diff --git a/FAQ.md b/FAQ.md
index e859f0f3..b5b50bab 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -188,11 +188,9 @@ or your mosquitto broker log shows messages like this -
 ```
 You have more than one device connected with the same %topic% defined. Its important that each device has a unique %topic% instead of the default `sonoff`.
 
-If that is not the issue, erase all flash using esptool.py or esptool.exe and flash again by wire (as explained [here](#esptool-usage)) using [the latest precompiled bins with core v2.3](http://thehackbox.org/tasmota/020300/).
+If that is not the issue, erase all flash using esptool.py or esptool.exe and flash again by wire (as explained [here](#esptool-usage)) using [the latest precompiled bins with core v2.6](http://thehackbox.org/tasmota/pre-2.6/).
 
-For MQTT disconnections with Arduino core v2.5.2, please try command:
-
-   `Sleep 0`
+If you are experiencing MQTT disconnections with Arduino core v2.5.2, please upgrade to Core 2.6.
 
 ## Device
 ### Relay clicks and LED flashes at 1 second intervals
@@ -381,21 +379,7 @@ Example: Core-/SDK-Version: **2_3_0**/1.5.3(aec24ac9)
   - Some Routers of brands (Ubiquiti and Fritzbox) produce conflicts and disconnections
   - If the Wi-Fi router has auto channel, channel switching is not reliably  managed by this core. Use Fixed Channels in the router instead
 
-* 2.5.2 (**avoid this core version**): 
-  - All Tasmota features work
-  - Extend PWM resolution for low brightness lights ([Details](../pull/5742))
-  - Modem Sleep doesn't work but Tasmota has a CPU dynamic sleep to save energy, so it is not a big issue for this core
-  - Alexa works
-  - Web UI is fast
-  - Serial Software exceptions of 2.3.0 are solved
-  - Krack Vulnerability is solved
-  - More RAM is available compared to 2.4.2
-  - Firmware is a little bigger in size compared to 2.4.2
-  - Most Wi-Fi Repeaters don't produces conflicts or disconnections
-  - Mesh Networks are supported
-  - Most Routers of brands Ubiquity and Fritzbox don't produces conflicts or disconnections
-  - If the Wi-Fi router has auto channel, channel switching is not reliably  managed by this core. Use Fixed Channels in the router instead
-
+* 2.5.2 **Not supported beginning with 6.6.0.18**  
 
 ### Configuration problems