Zarva
The significator's for railroads are Uranus, Mercury, Gemini and the 3rd house.
Venus and Uranus have just left the conj. in the 6th house. I should think an aspect between Mars (Ascendant lord) and one of these would help you recieve your telephone back. The Via Combusta is upon your Ascendant so I don't really see you receiving any action directed in that way to aid you to retrieve it, at least by your own efforts, presently. There is an aspect involving Mercury retro in the 4th house, he will return to the tracks but I don't think the telly will be found, sorry.
Via Combusta on the Ascendant speaks of the question's efficacy, and with some difficulty to have the telephone return to you. Mars exalted near Jupiter suggests you were traveling or in a place where long journey's are taken, when you lost the telephone befitting to describe the railway station? I'm sorry but I don't think the phone is in tact at present and it would be difficult for you to retrieve it.
Hope someone helps by returning the phone to you, Mercury retrograde may only mean you return to the site, be careful should you return in the evening.
There is a slight possibility that the lost phone during the time Mercury was in retro could be solved when Mercury goes direct and will sextile Venus before she leaves the sign of Taurus, the opportunity is there to look or have the telly return to you, but only at a much later date.
Will you be looking for the telephone yourself? Mercury means returning by a youth efforts and not necessarily by you making the effort on your own to retrieve it, so there could be a possibility for it's retrieval but at a much later date by someone whom is young. You might ask another horary of "Will my telephone return to me by the help of someone else's efforts" or something to that effect?
Here's hoping your telephone comes back to you post haste...
Sincerely
Student of Astrology