50meg plan is 6.25 MBps maxed out.
I had a similar issue with an Actiontec v1000h with speed drops.
Wound up getting it replaced with another. Solved all issues.
said by nss_tech:
Resetting the modem won't fix a drop in speed like that.
6.2MB/s? What kind of speed is your plan? 2.5MB/s is close to what a 25mbps speed plan should give.