Linksys SPA2102 or SPA1001 Phone Adapter

iTalkBB charges an additional $15 deposit for Linksys SPA 2102 adapter while no extra charge for SPA 1001 one. However, it has been reported that some users experiencing call/quality problem with iTalkBB had the problem fixed after upgrading to SPA2102, especially for those with low bandwidth Internet connections. So if you had any doubt about your ISP, pick Linksys SPA2102. It can make quite a difference.