Edge 25 ... speed sensor connecting

i have Edge 25 for two years. I din't use it much, because it shows speed incorretly. Now I'm thinking about to buy speed sensor. As I read in forums here, Edge 25 has problems even it has connected speed sensor. I'm asking... is problem with 3.30 software solved?

Users said that speed doesn't  follows to speed sensor, when GPS is ON...

  • I have had the experience that the Garmin speed sensor does not make any difference in reading actual speed, it keeps on fluctuating although pairing was not a problem. I returned the speedsensor to the shop and I'm still using my old Sigma 509 for stable speed indication.