[Samsung Galaxy S9+ Questions & Answers] dinysam:
Summary of countries and providers with issue as posted on forums:

UPDATED AS AT 29th APRIL 2018

Please post your country and service provider so I can update the appropriate list if you are (or are not) having the same problem with your new S9.

CONFIRMED WORKAROUND ("FIXED*" for PERTH, AUSTRALIA): No More 4-20 second Silences during calls on my Samsung Galaxy S9 SM-G960F since I transferred my service from Aldimobile to Telstra. Much like the Lawsuit in Israel implies, it SEEMS that the network that Telstra rent to AldiMobile in Australia has an incompatibility issue with the Samsung Galaxy S9 firmware or hardware as may other networks reported worldwide.

ISSUE: SAMSUNG GALAXY S9 – INTERMITTENT SILENCE DURING CALLS THEN AUDIO COMES BACK.

BASED ON REPORTS THIS AFFECTS MODELS : SM-G960F & SM-G965F with Chipset Exynos 9810.

4 to 20 second SILENCES HAVE BEEN REPORTED ON FORUMS WHEN USING SIM CARDS FROM THESE PROVIDERS:

- Australia (Woolworths; Aldimobile; Lycamobile with VOLTE off; Telechoice; Vodafone with VOLTE on; Telstra (some areas like Newcastle and Central Coast NSW))

- Belgium (Proximus)

- Bulgaria (Telenor; MTel/A1)

- Croatia (VIP, Tomato, T-Mobile)

- France (Orange; SFR; Free Mobile)

- Germany (?)

- Greece (Vodafone)

- Hungary (Telekom; Vodafone)

- India (Airtel; Idea; Jio)

- Iran (MCI Telecom)

- Ireland (Eir; EE (UK Visitor?); Vodafone-up to 30 seconds silence)

- Israel (Suing Samsung)

- Italy (Windtre; TIM; Vodafone; H3G)

- Jordan (Zain)

- Lithuania (Vodafone)

- Malaysia (Maxis, Digi)

- NZ (Spark)

- Poland (TMobile; PLAY brand - no VOLTE)

- Portugal (Vodafone)

- Qatar (Ooredoo)

- Romania (Vodafone; Digi)

- Russia (Beeline)

- Saudi Arabia (Saudi Telecom Company STC, Mobily)

- Serbia (MTS, Telenor)

- Slovakia (Orange)

- South Africa (Vodacom)

- Spain (Yoigo; Vodafone; Movistar)

- Sweden (Comviq; Telia - VOLTE off-silences/VOLTE on–drops calls)

- Tunisia (Tunisie Telecom)

- Turkey (Turkcell)

- UK (EE; H3G, Sky; Vodafone; Three; O2 - S9&S9+)

- USA (T-Mobile) using European Model (SM-G960F/DS)

NO SILENCE DURING CALLS SO FAR:

- Australia (Telstra SIM - Perth Area; Vodafone - Most areas)

- Morocco (Orange)

- USA (MetroPCS) - different chipset/network protocols?

CALLS DROPPING / MISSED CALLS, MISSED SMSs

- India (Vodafone - missing calls)

- Montenegro (T-Mobile) S9+ duos, European model not USA model - Missing Calls (not Silences)

- UK (Virgin Mobile - missed calls)

- USA (Sprint; T-Mobile) - Missed calls - check phone models - possibly bought in Asia/Europe?

*Note: For the past 12 days on LONG Calls I have NO SILENCES at all on exactly the same S9, with exactly the same apps, calling from the same locations when I swap from AldiMobile SIM to Telstra SIM (Same Australian Network but Aldimobile is the cheaper Capped and Limited 4G piggyback service rented out by Telstra). If I swap back to the Aldimobile SIM then intermittent but regular ~6 seconds SILENCES reoccur from the first call of over about 4 minutes. The network that works is Telstra's "4GX" service. The other mobile virtual network operators (MVNOs) using Telstra MVNO network (with deliberate limitations) also have SILENCES during calls (e.g. Woolworths, LycaMobile). It would be interesting to know if only a subset of the EE network users are having problems because they also limit their services to MVNOs. This implies that the Israeli’s lawsuit is correct – an incompatibility with certain networks maybe even particular network switching software/hardware.

Please post your country and service provider so I can update the appropriate list if you are (or are not) having the same problem with your new S9.

FORUMS DISCUSSING THIS S9 SILENCE DURING CALLS ISSUE:

• Galaxy S9 Plus Call Drop Issue Seems To Be Global: https://www.androidheadlines.com/2018/04/galaxy-s9-plus-call-drop-issue-seems-to-be-global.html

• Multiple Articles: [Updated Continuously] Galaxy S9 users around the globe reporting call dropping issue: http://piunikaweb.com/2018/03/26/galaxy-s9-users-around-the-globe-reporting-call-dropping-issue/

• S9 speaker phone cutting out on call: https://eu.community.samsung.com/t5/Galaxy-S9-S9/S9-speaker-phone-cutting-out-on-call/td-p/451835

• S9 - Problems with Calls?: https://xdaforums.com/showthread.php?p=75942578

• DROPPED CALLS on G965F (S9+): [URL="https://xdaforums.com/galaxy-s9-plus/help/multiple-dropped-calls-galaxy-s9-plus-t3763887"[/URL]

• Australia Whirlpool - Samsung S9 & S9+ problems/faults/defects: http://forums.whirlpool.net.au/archive/2713222

• France: https://eu.community.samsung.com/t5...appel-inopiné-avec-Samsung-Galaxy/td-p/466277

• French Petition: https://tinyurl.com/y8wu658a

• Germany: https://www.inside-handy.de/news/48810-samsung-galaxy-s9-telefonie-problem

• Israel: Lawsuit - http://piunikaweb.com/2018/04/23/br...d-against-samsung-over-galaxy-s9-call-issues/

• Israel: The update did not help - Many purchasers of the Galaxy S9 and S9 Plus still suffer from audio malfunction: http://m.ynet.co.il/Articles/5231153 (Google Translate to English)

• Italy: https://eu.community.samsung.com/t5...ema-durante-la-conversazione/m-p/495235#M1738

• Poland: https://eu.community.samsung.com/t5/Galaxy-S9-S9/Problem-z-S9/td-p/464562/page/9

• South Africa: https://mybroadband.co.za/vb/showthread.php/950539-Samsung-Galaxy-s9-Call-Silence-Issue

• Spain: https://www.htcmania.com/showthread.php?t=1408282

• Some Samsung Galaxy S9 Owners Reporting Call Dropping Issues: https://www.androidheadlines.com/20...eporting-call-dropping-issues.html#discussion

• Only about 10% experiencing drop outs on S9/+ calls: https://eu.community.samsung.com/t5...experiencing-drop-outs-on-S9-calls/m-p/496842

• Some Samsung Galaxy S9 Owners Reporting Call Dropping Issues: https://www.androidheadlines.com/20...eporting-call-dropping-issues.html#discussion

Other useful References:

• S9 MODEL VARIANTS AND CHIPSETS PER REGION : http://www.teamandroid.com/2018/02/27/samsung-galaxy-s9-model-numbers-variants/