See State of Delhi vs Mohd. Afzal
electronic records such as SMSs have evidentiary value. Preserve SMS, mobile on which delivered and its SIM card. There should be no evidence of tampering.
DISCLAIMER : General information and advice provided is without any warranties as to suitability for any use, correctness and application to any specific case. Please always take proper legal counsel . However, if it helped anyone even a little a " thanks" would be appreciated and would encourage me to keep on making efforts :-) . I am also always open to corrections and further learnings from more experienced Seniors here.