The color of the line is insignificant. Pregnancy tests can only tell you if you are pregnant. The darkness of the line is no indication of how pregnant you are or how far along you are. You can use the brand tests, even from the same box and get a lighter or darker line any time.
The phantom calls that you have recieved, also known as ghost calls is usually caused by either a poor quality phone line, aka has a high amount of noise or foreign battery due to the line or your on an older copper line.
Wiring that has become intermittent due to corrosion or abrasion often results in noise on the line. If the noise is in the form of a crackling sound on the phone line, this is a strong possibility. Weather â Rain-induced moisture or lightning can adversely affect the quality of your phone line. Lightning strikes will cause intermittent popping noises, whereas rain intrusion can cause connection problems or a humming sound on the line.