The neighborhood is very nice, it looks very clean and welcoming. What caught my attention is what you say that if you are alone you should not take out your cell phone, Can rob it you?
A beautiful walk.
I loved the neighborhood. And well yes, in Bogota like other big cities in Latin America, the security issue is something to consider and it is better not to attract attention even in areas that look quite safe. Here in Caracas, there are also many areas where I wouldn't take my cell phone out either, and it is better to don't wear valuable things.
Saludos!