Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Flight Crew Total 7779; Flight Crew Type 1133
Communication Breakdown
ATC Issue All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Fuel Issue; Inflight Event / Encounter Weather / Turbulence
Flight Crew Executed Go Around / Missed Approach; Flight Crew Diverted
Weather; Environment - Non Weather Related
Following second missed approach due to weather climbed to VMC below FL055 in TKK. [Another flight] was holding in the high altitude above TKK; but we did not know what altitude they were holding at. Leveled below and preceded NW to ZZZ due to fuel concerns. Tried contacting KZAK (Oakland Oceanic) on CPDLC....no answer. Tried breaking into SFO radio on HF....no luck. Tried contacting both KZAK and SFO radio via SATCOM...no luck. KZAK would not answer SATCOM call....rang over 30 times. KZAK would not answer EMERGENCY SATCOM call....rang over 30 times. Started to climb to higher altitude VMC; all while trying to contact for clearance. Leveled at FL245 while maintaining VMC. Finally was able to break into SFO radio's reading of SIGMETS to multiple flight by declaring PAN; PAN; PAN. Was unable to coordinate altitude de-confliction with [other flight] on both 123.45; and 121.5; but did observe them on the TCAS well above our altitude. Received clearance from SFO radio after almost 5-10 minute further delay after contact. [Dispatch] was not verbally contacted following the flight. [Dispatch] was contacted via ACARS.
Air Carrier Captain reported difficulties with weather and ATC communications resulting in a diversion.