static int copyFileToPhone_chunkSize = 500000; // see #1004128

static void copyFileToPhone(S localPath, S destPath, bool withContinue) {
  copyFileToPhone(new File(localPath), destPath, withContinue);
}

static void copyFileToPhone(File f, S destPath, bool withContinue) {
  if (!f.isFile()) fail("Not a file: " + f2s(f));
  if (destPath.endsWith("/")) destPath += f.getName();
  
  long i = 0;
  long len = f.length();
  DialogIO io = talkTo(gateway(), 4999);
  try {
    if (withContinue) {
      i = parseLong(io.askLoudly(forward("Awareness", "get file * length", destPath)));
      if (i == len) { print("File fully copied"); ret; }
    }
    if (i == 0)
      io.askLoudly(forward("Awareness", "delete file *", destPath));
    for (; i < len; i += copyFileToPhone_chunkSize) {
      print("[Copying file to phone, " + i + "/" + len + "]");
      long j = min(len, i+copyFileToPhone_chunkSize);
      byte[] data = loadBinaryFileChunk(f, i, toInt(j-i));
      S answer = io.ask(forward("Awareness", "write file * bin from * data *",
        destPath, i, bytesToHex(data)));
      assertTrue(answer, match("OK", answer));
    }
  } finally {
    io.close();
  }
}

Began life as a copy of #1004188