Phone slower after upgrade to V81

[Lucia_Yealink]

HI Avayax，

About the slwoer issue, please share us more info below:
1. how much seconds the phone need to react?
2. did the phone connect the headset?
3. how long the phone was used? Does reboot the phone solve the issue?
4. Please upgrade the phone to the latest firmware and reset the phone to factory by long press the OK key, then do test again.

Latest firmware: http://download.support.yealink.com/down...1.0.25.zip
And help us to collect the files below:
a. level 6 syslog
b. config.bin
c. pace trace

About how to collect the info, please refer the FAQ below:
http://support.yealink.com/faq/faqInfo?id=313

5.Besides, please kindly tell me the probability:
How many phones you have in total? And how many of them have the issue?
How often did the slower issue happen？

For the beeps when pressing digits, you can configure the parameter below via auto provision to enable or disable it:
features.key_tone =
#1-enabled, 0-disabled.

Thank you for your info in advanced.