1-1 telephonic followed by f2f. Prolonged process. Applied through consultancy and got a call back for telephonic after a month. Both telephonic and f2f was very strong and related to core 3gpp spec related. After multiple calls to hr team, i was told my offer is on hold! Both the teephonic and f2f was conducted by the same person who was impressed with my skill set. But negative response from hr team. Probably because of huge notice period