Maybe someone will simplify life.
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 | MTS-MoscowMMSC: https: // mmsc
 Proxy: 192.168.192.192:8080
 APN: mms.mts.ru
 Username: mts
 Password: mts
 Image size: any
 UserAgent: iPhone
 
 | Beeline RussiaMMSC: https: // mms /
 Proxy: 192.168.094.023:8080
 APN: mms.beeline.ru
 Username: beeline
 Password: beeline
 Image size: any
 UserAgent: iPhone
 
 | Megaphone-RussiaMMSC: https: // mmsc: 8002
 Proxy: 10.10.10.10:8080
 APN: mms
 Username: mms
 Password: mms
 Image size: any
 UserAgent: iPhone
 
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MTS South District
MMSC: https: // mmsc
Proxy: 192.168.192.192:8080
APN: mms.kuban
Username: mts
Password: mts
Image size: any
UserAgent: iPhone
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MTS-Siberia
MMSC: https: // mmsc
Proxy: 192.168.192.192:8080
APN: mms.sib
Username: mts
Password: mts
Image size: any
UserAgent: iPhone
MTS-Far East
MMSC: https: // mmsc
Proxy: 192.168.192.192:8080
APN: mms.dv
Username: mts
Password: mts
Image size: any
UserAgent: iPhone
MTS-Ural
MMSC: https: // mmsc
Proxy: 192.168.192.192:8080
APN: mms.ural
Username: mts
Password: mts
Image size: any
UserAgent: iPhone
MTS-Tatarstan
MMSC: https: // mmsc
Proxy: 192.168.192.192:8080
APN: mms.kazan
Username: mts
Password: mts
Image size: any
UserAgent: iPhone
MTS-Nizhny Novgorod
MMSC: https: // mmsc
Proxy: 192.168.192.192:8080
APN: mms.nnov
Username: mts
Password: mts
Image size: any
UserAgent: iPhone
MTS-Saint-Petersburg
MMSC: https: // mmsc
Proxy: 192.168.192.192:8080
APN: mms.spb
Username: mts
Password: mts
Image size: any
UserAgent: iPhone
MTS-Ukraine
MMSC: https: // mms /
Proxy: 192.168.010.010:8080
APN: mms
Username: do not fill
Password: do not fill
Image size: any
UserAgent: iPhone
MTS-Belarus
MMSC: https: // mmsc
Proxy: 192.168.192.192:8080
APN: mms.mts.by
Username: mts
Password: mts
Image size: any
UserAgent: iPhone
MTS-Turkmenistan
MMSC: https: // mmsc
Proxy: 010.192.035.001:8080
APN: mms.mts.tm
Username: do not fill
Password: do not fill
Image size: any
UserAgent: iPhone
Beeline Ukraine
MMSC: https: // mms /
Proxy: 172.29.18.192:8080
APN: mms.beeline.ua
Username: do not fill
Password: do not fill
Image size: any
UserAgent: iPhone
Beeline-Kazakhstan
MMSC: https://mms.beeline.kz/mms/wapenc
Proxy: 172.027.006.093:8080
APN: mms.beeline.kz
Username: 
mms .beeline
Password: beeline
Image size: any
UserAgent: iPhone
Beeline Tajikistan
MMSC: https://172.028.252.211/mms/wapenc
Proxy: 172.028.253.069:8080
APN: mms.beeline.tj
Username: beeline
Password: beeline
Image size: any
UserAgent: iPhone
Beeline Uzbekistan
MMSC: https://mms.beeline.uz/mms/wapenc
Proxy: 172.30.30.166:8080
APN: mms.beeline.uz
Username: beeline
Password: beeline
Image size: any
UserAgent: iPhone
UTEL Perm
MMSC: https: // mms
Proxy: 192.168.168.192:8080
APN: mms.usi.ru
Username: do not fill
Password: do not fill
Image size: any
UserAgent: iPhone
Moldcell Moldova
MMSC: mms.moldcell.md/cmmsc/post
Proxy: 10.0.10.10:9401
APN: mms
Username: mms
Password: mms
Image size: any
UserAgent: iPhone
SMARTS Shupashkar-GSM
MMSC: https://172.24.120.135/mms/wapens
Proxy: 172.24.128.5:9201
APN: mms.smarts.ru
Username: wap
Password: wap
Image size: any
UserAgent: iPhone
BaikalWestCom
MMSC: https: // mmsc / mms
Proxy: 10.10.17.2:9201
APN: mms.bwc.ru
Username: bwc
Password: bwc
Image size: any
UserAgent: iPhone
Velcom-Belarus
MMSC: https://mms.velcom.by/servlets/mms
Proxy: 010.200.015.015:8080
APN: mms.velcom.by
Username: mms
Password: mms
Image size: any
UserAgent: iPhone
NSS-Nizhny Novgorod
MMSC: https://10.0.3.50
Proxy: 10.0.3.20:8080
APN: mms
Username: do not fill
Password: do not fill
Image size: any
UserAgent: iPhone
Life Ukraine
MMSC: https://mms.life.com.ua/cmmsc/post
Proxy: 212.58.162.230:8080
APN: mms
Username: do not fill
Password: do not fill
Image size: any
UserAgent: iPhone
Djuice Ukraine
MMSC: https://mms.kyivstar.net
Proxy: 10.10.10.10:8080
APN: mms.djuice.com.ua
Username: mms
Password: mms
Image size: any
UserAgent: iPhone
Kyivstar
MMSC: https://mms.kyivstar.net
Proxy: 10.10.10.10:8080
APN: mms.kyivstar.net
Username: mms
Password: mms
Image size: any
UserAgent: iPhone