All Sender IDs in messages sent to Bangladesh Citycell (47005) will be changed to a local Number (in international format) to ensure message delivery, as the network is heavily filtering on Sender IDs.
For all other networks alphanumeric senders are supported but numeric senders maybe changed to a local numeric
The networks are also heavily filtering on spam and keywords such as "police" will block messages from being delivered.
Other features/restrictions of note:
Additionally please note that DLRs are fake and are should not be taken as a true reflection of delivery quality.