The USSD feature was broken on my Max BR1 with the 6.3.3 build 2252 firmware update (worked fine with firmware 6.3.1 build 2023). I used to be able to use USSD codes that were enclosed in hashtags (like #123#). These are required by my ISP to purchase credit, etc. However, under 6.3.3 when I try to use codes enclosed in hashtags I get the error message “invalid USSD code”. I have confirmed the problem was introduced in firmware 6.3.3 because I reverted to 6.3.1 and the codes surrounded by hashtags are working just fine again.
Could you please correct this?
Also, can you please tell me if hashtag symbol is working in USSD codes with version 7 firmware? I don’t want to upgrade my unit to v7 until I know this, since firmware downgrade to v6 won’t be possible.