If you want to reset rb750, press and hold the reset button while turning on rb750, wait until the ACT light starts blinking, then release the reset button. Winbox to rb750 by default configuration, can only be accessed from port 2-5. Do not forget to set the admin password.

profiles and validity field only in the userman-test (beta) version. for beta version, can be found in "User Manager v4.0 test package" sticky thread. for the older version(default 4.2 still using the old version), you can set active period(start at first time user logged on) in the credit...

I think he want something like GSM/CDMA prepaid voucher.. Vouchers has a separated table and contains the period of validity. Each person has their own fixed GSM/CDMA phone number, but when he entered the grace period, he was obliged to purchase prepaid vouchers to extend the use of their phone numb...

We have no plans to do that. It's recommended to use v4.x instead

When it's recommended to use v4.x instead, why it does came with RouterOS v3.31 instead of v4.x?

Don't you loose one free upgrade that way? i.e. if it comes with v3 than you upgrade for free to v4, if it came with v4 you're eligible to free v5... I have few RB750 for my customers, all came with v3.29 and the license says it was upgradeable to v4.x. But after I upgraded to v4.2, the license say...

It doesn't have microSD card slot. I got my RB750G yesterday, and mine is already installed with RouterOS 3.31 (which the latest legacy version at mikrotik.com is still 3.30). ps: And one more thing, my RB750G doesn't have any beeper as written in the brochure/data sheet. Brochure says: "Extras...