How to block, mark as spam, or unblock phone numbers on Archos devices

Archos 70d Titanium Archos 70d Titanium
Archos 40 Access 4G Archos 40 Access 4G
Archos Core 101 3G Archos Core 101 3G
Archos Core 101 3G V2 Archos Core 101 3G V2
Archos Core 57S Archos Core 57S
Archos Core 55S Archos Core 55S
Archos Core 60S Archos Core 60S
Archos Junior Phone Archos Junior Phone
Archos Access 57 Archos Access 57
Archos 101f Neon Archos 101f Neon
Archos Core 55S Ultra Archos Core 55S Ultra
Archos Oxygen 101 S Archos Oxygen 101 S
Archos Access 50 S Archos Access 50 S
Archos Core 62S Archos Core 62S
Archos Diamond Archos Diamond
Archos Oxygen 63 Archos Oxygen 63
Archos Oxygen 57 Archos Oxygen 57
Archos Oxygen 68XL Archos Oxygen 68XL
Archos Saphir 50X Archos Saphir 50X
Archos Diamond Omega Archos Diamond Omega