Can't answer phone calls (Sprint iPhone 6s) – Google Voice Review

It's been about 6 months now and I still can't answer calls routed to my Google voice number. Usually by pressing 1 you can answer the call, but the only thing that works for me is pressing 2 which takes the caller straight to my google voicemail (which defeats the purpose). Tried uninstalling and reinstalling and it still doesn't work. Please fix this Google.
Review by Lakeshow786 on Google Voice.