Learning Center: data, SMS & China
Follow a path or read one answer. Everything here is free and stands on public sources.
Learning paths
Start here
Mobile networks 101: a buyer’s courseTen short modules on radio, cells, generations, roaming, identity, APN, operators and performance — written for buyers.
Eight lessons: what A2P is, SMPP in plain language, transports, sender IDs, OTP delivery, connection, route testing and how to choose a provider.
Seven lessons: device numbers, eSIM generations, multi-IMSI, bearer choice and roaming architectures.
Four steps, ending with the route selector: access options from Latin America, private-line definitions, routing and the which-route tool.
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All explainers
A2P SMS
Cellular IoT & eSIM
- APN and private access
- Bandwidth is not speed
- Buying connectivity: what to ask
- Cells, coverage and capacity
- Generations, refarming and sunsets
- Identity: four numbers and an eUICC ID
- MNO, MVNO and who owns what
- Multi-IMSI vs eUICC: identity vs profile
- NB-IoT vs LTE-M vs Cat-1 bis vs Cat-4
- Radio, spectrum and dBm
- Roaming: home routing vs local breakout
- SGP.22 vs SGP.32: who activates
- The network in one page
- What is an eSIM? Profile and eUICC
- What is multi-IMSI? Identities on one SIM
Connect to China
Export devices
A–Z index
- 2 2G and 3G retirement
- A A2P SMS, APN, AS number
- B Beamforming, BGP
- C Carrier aggregation, CDR, Cell
- D Data residency, DIA, DLR, DNS
- E EARFCN, eUICC identifier (EID), eSIM, eUICC
- F Frequency band
- G GDPR, gNodeB, GSM-7
- H HLR, Home subscriber server (HSS)
- I ICCID, ICP filing, IEPL, IMEI, IMSI, IPLC, IP transit
- J Jitter
- L Latency, LGPD, Local profile assistant (LPA), LTE-M
- M Message concatenation, M2M, MCC, MIIT, MNC, MNO, Mobile number portability, MSIN, MSISDN, Multi-IMSI, MVNO
- N NB-IoT
- O Opt-in, Opt-out, One-time password
- P P2P, Packet loss, PDU, Packet gateway (PGW), Ping, PIPL, PLMN, PoP, Private APN
- R Radio access network (RAN), RCS, Refarming, Roaming, RSRP, RTT
- S Sender ID, Sender registration, SGP.02, SGP.22, SGP.32, Short code, SIM, SMPP, SMS signature, SMS template, SMSC, Spectrum
- T TAC, Throughput, TTFB
- U UCS-2
- V VoLTE
- W Webhook
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