finally we were able to exchange our emails Thank you for your answer !
In the meantime I read these very interesting news:
Don't worry, we always keep improving product and never give up. Can you explain more in detail, what you modified exactly in GPS firmware ?
We already prepare 10pcs with new GPS firmware to do field test. However, tayphoon is coming...
We also consider to enlarge the display and supports foot pod on GH-505 as long term plan.
And what do you mean with "enlarge display" ? I think you want to enlarge some fonts, right ?
And how long do you think is a "long term" plan ?
Thank you for answering
I am also exciting to receive your email finally.
Not only enlarge font, but change to larger display due to feedback from market.
Because we found the orginal GPS firmware would get crazy and unreliable under weak signal after power off and power on sometimes.
Sirf has release new firmware to fix this problem and the test result is so far as good.
Last time we have tested the new GPS firmware and ensured it improves hot fix.
Sunday afternoon I compared 3 type watch, there are new GPS firmware, orginal GPS firmare and GH-625.
The order of distance from small to big is: orginal GPS, new GPS firmware and GH-625.
I tried went along wood, building and road and found orginal firmware of GH-505 got lost singal frequently and recover slowly.
New firmware is much better and as same as GH-625. Even though the sensitivity is not as bettrer as GH-625.
So I think new GPS firmware can improve GPS singal aquisition and lost signal besides sensitivity since antenna.
But it is pity, we still get stuck on firmware implementation which adds GPS firmware updatiing feature.