I am looking for a good quality wireless SIP phone for Asterisk. Needs good battery life, easy operation, and be able to jump between Access Points quickly. We have tried a D-Link flip phone, easy to use, lousy battery life and poor AP jumping. Also tried a Hitachi, better battery, and better AP jumping, not user friendly.
Looking at Polycom, Rather High Price. Would like to stay under $300.00 per handset.
Try Nokia E51 which can be had for $100 or any of the Nokia’s later models.
You might also consider DECT phones which have better range and better battery life - e.g Gigaset S675IP.
It can hop between bases easily. DECT bases cost peanuts (<$50)