T46G goes reboot during phone call

[zonder]

Dear Support,

1. Yes, we use DC 5V/2A power adapters
2. As of today 8 of 30 T46G model users are reporting about phone's regular rebooting (near 3-6 reboots per day)
3. I collected syslog level 6 log and config.bin file and submitted them to support@yealink.com. It is not possible to get pcap log, since after phone reboots pcap log became cleared file I extracted is empty (24 byte long).

Please advise which version of T46G firmware you recommend to use with MyPBX U500 (the PBX we are using with T46G phones) ?

Currently all our T46G phones have firmware version 28.71.0.180.

28.72.0.1 and 28.72.0.25 versions have problem with auto-provision (extension is not being assigned after phone reboot)

Thank you